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- Let H = {(a a12 a21 a22, | a1 + a2 = 0} . € R²x²: a11 + a22 (i) Show that H is a subspace of R2×2 (ii) Find a basis of H and determine dim H.arrow_forward2 5 A=1 2 -2 b=2 3 1 -1 3 (a) Calculate det(A). (b) Using (a), deduce that the system Ax = b where x = (x1, x2, x3) is consistent and determine x2 using Cramer's rule.arrow_forwardConsider the least squares problem Ax = b, where 12 -09-0 A 1 3 1 4 and b = (a) Write down the corresponding normal equations. (b) Determine the set of least squares solutions to the problem.arrow_forward
- Mrs Skeel is told that interest is given by the Varying Interest Rate Model in which R, is the interest rate between time i and i + 1. The random variables R are i.i.d. with common distribution (a) Answer: R₁ = {4% 4% with probability 0.3, 5% with probability 0.7. Mrs Skeel deposits £200 at time i = 0. What is the expected value of the deposit at time i = 5? Enter the answer correct to the nearest pound. (b) i Suppose that Mrs Skeel deposits £100 at time i = 0 and £200 at time i = 1. Determine the expected value of the money accumulated at time =2. Enter the answer correct to the nearest pound. Answer:arrow_forward(c) Let G be the group with Cayley table given below. Show that G is not a group. d * e a b C e e a b C d a b 00 a e с d b b C e b a с C d b e C dd b a C earrow_forward1.evaluate using gamma function Find the factorial of a.3*7/2! b.(13/2)! * 6! * 2/3 Please don't use artificial intelligencearrow_forward
- A ladder 25 feet long is leaning against the wall of a building. Initially, the foot of the ladder is 7 feet from the wall. The foot of the ladder begins to slide at a rate of 2 ft/sec, causing the top of the ladder to slide down the wall. The location of the foot of the ladder, its x coordinate, at time t seconds is given by x(t)=7+2t. wall y(1) 25 ft. ladder x(1) ground (a) Find the formula for the location of the top of the ladder, the y coordinate, as a function of time t. The formula for y(t)= √ 25² - (7+2t)² (b) The domain of t values for y(t) ranges from 0 (c) Calculate the average velocity of the top of the ladder on each of these time intervals (correct to three decimal places): . (Put your cursor in the box, click and a palette will come up to help you enter your symbolic answer.) time interval ave velocity [0,2] -0.766 [6,8] -3.225 time interval ave velocity -1.224 -9.798 [2,4] [8,9] (d) Find a time interval [a,9] so that the average velocity of the top of the ladder on this…arrow_forwardAlready got wrong chatgpt answer Plz don't use chatgpt answer will upvote .arrow_forward9 AB is parallel to plane m and perpendicular to plane r. CD lies in r. Which of the following must be true? arim br m 6 CD L m d AB || CD e AB and CD are skew.arrow_forward
- a. A company is offering a job with a salary of $35,000 for the first year and a 3% raise each year after that. If the 3% raise continues every year, find the amount of money you would earn in a 40-year career.arrow_forward(6) Prove that the image of a polygon in R², under an isometry, is congruent to the original polygon.arrow_forwardThe function f(x) is represented by the equation, f(x) = x³ + 8x² + x − 42. Part A: Does f(x) have zeros located at -7, 2, -3? Explain without using technology and show all work. Part B: Describe the end behavior of f(x) without using technology.arrow_forward
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