MYLAB MATH-W/ETEXT F/FUND.DIFF.EQUAT.
7th Edition
ISBN: 9780135902738
Author: Nagle
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 7.9, Problem 2E
To determine
The value of given
Expert Solution & Answer

Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
Nsjsjsj
log (6x+5)-log 3 = log 2 - log x
1 The ratio of Argan to Potassium from
a sample found
sample found in Canada is .195
Find The estimated age of the sample
A
In (1+8.33 (+))
t = (1-26 × 109) en (1
In a
Chapter 7 Solutions
MYLAB MATH-W/ETEXT F/FUND.DIFF.EQUAT.
Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1-12, use Definition 1 to determine...Ch. 7.2 - In Problems 1 -12, Use Definition 1 to determine...
Ch. 7.2 - In Problems 112, use Definition 1 to determine the...Ch. 7.2 - In Problems 112, use Definition 1 to determine the...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - Prob. 14ECh. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 13-20, use the Laplace transform table...Ch. 7.2 - In Problems 2128, determine whether f(t) is...Ch. 7.2 - Prob. 22ECh. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - In Problems 21-28, determine whether f(t) is...Ch. 7.2 - Which of the following functions are of...Ch. 7.2 - For the transforms F(s) in Table 7.1, what can be...Ch. 7.2 - Thanks to Eulers formula page 166 and the...Ch. 7.2 - Prob. 32ECh. 7.2 - Prove that if f is piecewise continuous on [a,b]...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - Prob. 6ECh. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - Prob. 9ECh. 7.3 - In Problems 1-20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - In Problems 1- 20, determine the Laplace transform...Ch. 7.3 - Prob. 19ECh. 7.3 - Prob. 20ECh. 7.3 - Given that L{cosbt}(s)=s/(s2+b2), use the...Ch. 7.3 - Starting with the transform L{1}(s)=1/s, use...Ch. 7.3 - Use Theorem 4 on page 362 to show how entry 32...Ch. 7.3 - Show that L{eattn}(s)=n!/(sa)n+1 in two ways: a....Ch. 7.3 - Use formula (6) to help determine. a. L{tcosbt}....Ch. 7.3 - Prob. 26ECh. 7.3 - Prob. 27ECh. 7.3 - Prob. 28ECh. 7.3 - The transfer function of a linear system is...Ch. 7.3 - Prob. 30ECh. 7.3 - Prob. 31ECh. 7.3 - Prob. 32ECh. 7.3 - Prob. 33ECh. 7.3 - Prob. 34ECh. 7.3 - Prob. 35ECh. 7.3 - Prob. 36ECh. 7.3 - Initial value theorem. Apply the relation...Ch. 7.3 - Prob. 38ECh. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - Prob. 5ECh. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - In Problems 1-10, determine the inverse Laplace...Ch. 7.4 - Prob. 11ECh. 7.4 - Prob. 12ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - Prob. 14ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - Prob. 17ECh. 7.4 - Prob. 18ECh. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 11-20, determine the partial fraction...Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - Prob. 22ECh. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - In Problems 21-30, determine L1{F}....Ch. 7.4 - Determine the Laplace transform of each of the...Ch. 7.4 - Prob. 32ECh. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Theorem 6 in Section 7.3 on page 364 can be...Ch. 7.4 - Prob. 37ECh. 7.4 - Prob. 38ECh. 7.4 - Prob. 39ECh. 7.4 - Heavisides Expansion Formula. Let P(s) and Q(s) be...Ch. 7.4 - Prob. 41ECh. 7.4 - Prob. 42ECh. 7.4 - Prob. 43ECh. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 114, solve the given initial value...Ch. 7.5 - In Problems 1-14, solve the given initial value...Ch. 7.5 - In Problems 114, solve the given initial value...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 1524, solve for Y(s), the Laplace...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2528, solve the given third-order...Ch. 7.5 - In Problems 2932, use the method of Laplace...Ch. 7.5 - In Problems 2932, use the method of Laplace...Ch. 7.5 - In Problems 29-32, use the method of Laplace...Ch. 7.5 - In Problems 29-32, use the method of Laplace...Ch. 7.5 - Prob. 33ECh. 7.5 - Use Theorem 6 in Section 7.3, page 364, to show...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - In Problems 3538, find solutions to given initial...Ch. 7.5 - Determine the error e(t) for the automatic pilot...Ch. 7.5 - Prob. 40ECh. 7.5 - Prob. 41ECh. 7.6 - In Problems 14, sketch the graph of the given...Ch. 7.6 - Prob. 2ECh. 7.6 - In Problems 14, sketch the graph of the given...Ch. 7.6 - Prob. 4ECh. 7.6 - In Problems 510, express the given function using...Ch. 7.6 - In Problems 510, express the given function using...Ch. 7.6 - Prob. 7ECh. 7.6 - In Problems 5-10, express the given function using...Ch. 7.6 - Prob. 9ECh. 7.6 - Prob. 10ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - Prob. 12ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - Prob. 16ECh. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - In Problems 1118, determine an inverse Laplace...Ch. 7.6 - The current I(t) in an RLC series circuit is...Ch. 7.6 - The current I(t) in an LC series circuit is...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 2124, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - In Problems 2532, solve the given initial value...Ch. 7.6 - In Problems 25-32, solve the given initial value...Ch. 7.6 - Prob. 35ECh. 7.7 - In Problems 1-4, determine L{f}, where f(t) is...Ch. 7.7 - Prob. 2ECh. 7.7 - Prob. 3ECh. 7.7 - In Problems 1-4, determine L{f}, where f(t) is...Ch. 7.7 - Prob. 5ECh. 7.7 - Prob. 6ECh. 7.7 - In Problems 5-8, determine L{f}, where the...Ch. 7.7 - Prob. 8ECh. 7.7 - Show that if L{g}(s)=[(s+)(1eTs)]1, where T0 is...Ch. 7.7 - Prob. 10ECh. 7.7 - Prob. 11ECh. 7.7 - Prob. 12ECh. 7.7 - Prob. 14ECh. 7.7 - Prob. 15ECh. 7.7 - Prob. 16ECh. 7.7 - In Problems 1518, find a Taylor series for f(t)...Ch. 7.7 - Prob. 18ECh. 7.7 - Prob. 19ECh. 7.7 - Use the recursive relation (7) and the fact that...Ch. 7.7 - Prob. 21ECh. 7.7 - Prob. 22ECh. 7.7 - Prob. 23ECh. 7.7 - Use the procedure discussed inProblem 23 to show...Ch. 7.7 - Find an expansion for ln[1+(1/s2)] in powers of...Ch. 7.7 - Prob. 26ECh. 7.7 - Prob. 27ECh. 7.8 - In Problems 14, use the convolution theorem to...Ch. 7.8 - Prob. 2ECh. 7.8 - Prob. 3ECh. 7.8 - Prob. 4ECh. 7.8 - Prob. 5ECh. 7.8 - Prob. 6ECh. 7.8 - Prob. 7ECh. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - Prob. 9ECh. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - In Problems 512, use the convolution theorem to...Ch. 7.8 - Prob. 13ECh. 7.8 - Find the Laplace transform of f(t):=0tevsin(tv)dvCh. 7.8 - Prob. 15ECh. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - Prob. 17ECh. 7.8 - Prob. 18ECh. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - In Problems 1522, solve the given integral...Ch. 7.8 - Prob. 22ECh. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - Prob. 24ECh. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - In Problems 2328, a linear system is governed by...Ch. 7.8 - Prob. 29ECh. 7.8 - In Problems 29 and 30, the current I(t) in an RLC...Ch. 7.8 - Prob. 31ECh. 7.8 - Prob. 32ECh. 7.8 - Prob. 33ECh. 7.8 - Prob. 34ECh. 7.8 - Prob. 35ECh. 7.8 - Prob. 36ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - Prob. 2ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - Prob. 4ECh. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - In Problems 1-6, evaluate the given integral....Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - Prob. 11ECh. 7.9 - In Problems 7-12, determine the Laplace transform...Ch. 7.9 - Prob. 13ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - Prob. 15ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - Prob. 19ECh. 7.9 - In Problems 13-20, solve the given symbolic...Ch. 7.9 - In Problems 21-24, solve the given symbolic...Ch. 7.9 - Prob. 22ECh. 7.9 - In Problems 21-24, solve the given symbolic...Ch. 7.9 - Prob. 24ECh. 7.9 - Prob. 25ECh. 7.9 - Prob. 26ECh. 7.9 - Prob. 27ECh. 7.9 - Prob. 28ECh. 7.9 - Prob. 29ECh. 7.9 - Prob. 30ECh. 7.9 - A linear system is said to be stable if its...Ch. 7.9 - A linear system is said to be asymptotically...Ch. 7.9 - Prob. 33ECh. 7.9 - Prob. 34ECh. 7.9 - Figure 7.29 shows a beam of length 2 that is...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Prob. 9ECh. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Prob. 17ECh. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - In Problems 1-19, use the method of Laplace...Ch. 7.10 - Use the method of Laplace transforms to solve...Ch. 7.10 - Recompute the coupled mass-spring oscillator...Ch. 7.10 - In Problems 23 and 24, find a system of...Ch. 7.10 - In Problems 23 and 24, find a system of...Ch. 7.RP - In Problems 1 and 2, use the definition of the...Ch. 7.RP - In Problems 1 and 2, use the definition of the...Ch. 7.RP - Prob. 3RPCh. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - In Problems 3-10, determine the Laplace transform...Ch. 7.RP - Prob. 7RPCh. 7.RP - Prob. 8RPCh. 7.RP - Prob. 9RPCh. 7.RP - Prob. 10RPCh. 7.RP - Prob. 11RPCh. 7.RP - In Problems 11-17, determine the inverse Laplace...Ch. 7.RP - Prob. 13RPCh. 7.RP - Prob. 14RPCh. 7.RP - Prob. 15RPCh. 7.RP - Prob. 16RPCh. 7.RP - Prob. 17RPCh. 7.RP - Prob. 18RPCh. 7.RP - Prob. 19RPCh. 7.RP - In Problems 19-24, solve the given initial value...Ch. 7.RP - Prob. 21RPCh. 7.RP - Prob. 22RPCh. 7.RP - Prob. 23RPCh. 7.RP - Prob. 24RPCh. 7.RP - In Problems 25 and 26, find solutions to the given...Ch. 7.RP - In Problems 25 and 26, find solutions to the given...Ch. 7.RP - Prob. 27RPCh. 7.RP - Prob. 28RPCh. 7.RP - A linear system is governed by y5y+6y=g(t). Find...Ch. 7.RP - Prob. 30RPCh. 7.RP - Prob. 31RPCh. 7.RP - In Problems 31 and 32, use Laplace transforms to...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, subject and related others by exploring similar questions and additional content below.Similar questions
- 7. Find the doubling time of an investment earning 2.5% interest compounded a) semiannually b) continuouslyarrow_forward6. Find the time it will take $1000 to grow to $5000 at an interest rate of 3.5% if the interest is compounded a) quarterly b) continuouslyarrow_forwardA smallish urn contains 16 small plastic bunnies - 9 of which are pink and 7 of which are white. 10 bunnies are drawn from the urn at random with replacement, and X is the number of pink bunnies that are drawn. (a) P(X=6)[Select] (b) P(X>7) ≈ [Select]arrow_forward
- . Find how many years it takes for $1786 to grow to $2063 if invested at 2.6% annual interest compounded monthly. 12+arrow_forwardK=3, Gauss Seidel Fill in only 4 decimal places here in Canvas. Make sure in exam and homework, 6 decimal places are required. X1 = X2 = X3 =arrow_forwardA smallish urn contains 25 small plastic bunnies - 7 of which are pink and 18 of which are white. 10 bunnies are drawn from the urn at random with replacement, and X is the number of pink bunnies that are drawn. (a) P(X = 5)=[Select] (b) P(X<6) [Select]arrow_forward
- The fox population in a certain region has an annual growth rate of 8 percent per year. It is estimated that the population in the year 2000 was 22600. (a) Find a function that models the population t years after 2000 (t = 0 for 2000). Your answer is P(t) = (b) Use the function from part (a) to estimate the fox population in the year 2008. Your answer is (the answer should be an integer)arrow_forwardrarrow_forwardThe solutions are 1 where x1 x2- ● Question 11 Solve: x 54 Give your answer as an interval. Question 12arrow_forward
- A population of deer in Pierce County currently has 1875 deer, but due to urban development, the population is decreasing at a rate of 1.1% a year. a) Assuming this growth rate continues, find the formula for a function f(t) describing this population. b) In how many years will the population reach 1300? Do the problems on your own paper, show all your work, and submit your scanned work below. Choose File No file chosenarrow_forward● Question 7 Solve the equation. log2(3m - 5) = log2(m +8) m n = Question 8arrow_forwardQuestion 4 If log2(6x+3).= 4, then x = You may enter the exact value or round to 4 decimal places.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Discrete Mathematics and Its Applications ( 8th I...MathISBN:9781259676512Author:Kenneth H RosenPublisher:McGraw-Hill EducationMathematics for Elementary Teachers with Activiti...MathISBN:9780134392790Author:Beckmann, SybillaPublisher:PEARSON
- Thinking Mathematically (7th Edition)MathISBN:9780134683713Author:Robert F. BlitzerPublisher:PEARSONDiscrete Mathematics With ApplicationsMathISBN:9781337694193Author:EPP, Susanna S.Publisher:Cengage Learning,Pathways To Math Literacy (looseleaf)MathISBN:9781259985607Author:David Sobecki Professor, Brian A. MercerPublisher:McGraw-Hill Education

Discrete Mathematics and Its Applications ( 8th I...
Math
ISBN:9781259676512
Author:Kenneth H Rosen
Publisher:McGraw-Hill Education

Mathematics for Elementary Teachers with Activiti...
Math
ISBN:9780134392790
Author:Beckmann, Sybilla
Publisher:PEARSON


Thinking Mathematically (7th Edition)
Math
ISBN:9780134683713
Author:Robert F. Blitzer
Publisher:PEARSON

Discrete Mathematics With Applications
Math
ISBN:9781337694193
Author:EPP, Susanna S.
Publisher:Cengage Learning,

Pathways To Math Literacy (looseleaf)
Math
ISBN:9781259985607
Author:David Sobecki Professor, Brian A. Mercer
Publisher:McGraw-Hill Education
Evaluating Indefinite Integrals; Author: Professor Dave Explains;https://www.youtube.com/watch?v=-xHA2RjVkwY;License: Standard YouTube License, CC-BY
Calculus - Lesson 16 | Indefinite and Definite Integrals | Don't Memorise; Author: Don't Memorise;https://www.youtube.com/watch?v=bMnMzNKL9Ks;License: Standard YouTube License, CC-BY