Pretend, for the moment, that we do not know that e x is the inverse function of In ( x ) , but keep in mind that In ( x ) has an inverse function defined on ( − ∞ , ∞ ) . Call it E. Use the identity In x y = In x + In y to deduce that E ( a + b ) = E ( a ) E ( b ) for any real numbers a, b.
Pretend, for the moment, that we do not know that e x is the inverse function of In ( x ) , but keep in mind that In ( x ) has an inverse function defined on ( − ∞ , ∞ ) . Call it E. Use the identity In x y = In x + In y to deduce that E ( a + b ) = E ( a ) E ( b ) for any real numbers a, b.
Pretend, for the moment, that we do not know that
e
x
is the inverse function of
In
(
x
)
, but keep in mind that
In
(
x
)
has an inverse function defined on
(
−
∞
,
∞
)
. Call it E. Use the identity
In
x
y
=
In
x
+
In
y
to deduce that
E
(
a
+
b
)
=
E
(
a
)
E
(
b
)
for any real numbers a, b.
2. Consider the following:
Prove that x, x2, and 1/x are the solutions to the homogeneous equation
corresponding to x³y"" + x²y" + 2xy' + 2y = 2x4.
b. use variation of parameters to find a particular solution and complete the general
solution to the differential equation. I am interested in process. You may use a
computer for integration, finding determinants and doing Kramer's.
Why the correct answer is letter A?
Students in an online course are each randomly assigned to receive either standard practice exercises or adaptivepractice exercises. For the adaptive practice exercises, the next question asked is determined by whether the studentgot the previous question correct. The teacher of the course wants to determine whether there is a differencebetween the two practice exercise types by comparing the proportion of students who pass the course from eachgroup. The teacher plans to test the null hypothesis that versus the alternative hypothesis , whererepresents the proportion of students who would pass the course using standard practice exercises andrepresents the proportion of students who would pass the course using adaptive practice exercises.The teacher knows that the percent confidence interval for the difference in proportion of students passing thecourse for the two practice exercise types (standard minus adaptive) is and the percent…
3. A spring is stretched 6 in. by a mass that weighs 8 lb. The mass is attached to a dashpot
mechanism that has a damping constant of 0.25 lb-sec./ft. and is acted on by an external
force of 4 cos 2t lb.
a. Set-up the differential equation and initial value problem for the system.
b. Write the function in phase-amplitude form.
C.
Determine the transient solution to the system. Show your work.
d. Determine the steady state of this system. Show your work.
e.
Is the system underdamped, overdamped or critically damped? Explain what this
means for the system.
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01 - What Is A Differential Equation in Calculus? Learn to Solve Ordinary Differential Equations.; Author: Math and Science;https://www.youtube.com/watch?v=K80YEHQpx9g;License: Standard YouTube License, CC-BY
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