14. Let (a, b) = 1 and x" = yb for some integers a and y. Then prove that there exists an integer n such that x = n and y = n°. 15. prove that ILa, d = nd(n)/2. 16. prove that dn H²(d) = 2~(n). %3D
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- For x = 1, 2, 3 and y = 1, 2, let the joint pmf of X and Y be defined by f X,Y (x, y) = (x+y)/21 Show Cov(X, Y)△XYZ is given with X(2, 0), Y(0, −2), and Z(−1, 1). Which of the following can be used to prove that △XYZ is isosceles?use the cauchy euler method with h=1/m (m integer) to approximate y(3) for the IVP below. ın each case let h-0 (m- inf) and compare the lımıts with the exact values y'=y^2 y(-1)=0
- 2. Give the condition which ensure that |ez| < 1 where z in C.Suppose w=x/y+y/z, wherex=e3t, y=2+sin(t)x=e3t, and z=2+cos(6t). A ) Use the chain rule to find dwdtdwdt as a function of x, y, z, and t. Do not rewrite x, y, and z in terms of t, and do not rewrite e3t as x. dw/dt= B ) Use part A to evaluate dwdtdwdt when t=0.We have the following DFT results for two 1D signals x and y of length two as x' = [4 - 3i 0], y' = [0 12 + 5i]. Calculate the convolution x*y.
- Compute N(0) if r(t)=<t sin t+ cos t,2t^2,sin t-t cos y> and prove that T(0) and N(0) are orthogonal2(3) Calculate the following commutators: (a) [d/dx, x·d/dx] (b) [sin(x), cos(x)] (c) [x^2, Ĥ] , where Ĥ is a 1D Hamiltonian with V̂=V0 (constant) (d) [Â,B̂], where  = d^2/dx^2 + x and = 1Plz give correct solution. Suppose T in L(F^2) and dim E(3, T) = 2. Prove that T is invertible.
- calculate y(0,1) with the interval Δx = 0.025 using the Euler, Heun, Ralston, Runge Kutta order 3, and Runge-kutta order 4 methodsplease find x,y,z 1-t for x is not right by the waySuppose a spherical balloon grows in such a way that after t seconds, its volume V is given by V = 4 t1/2 cm3. After 100 seconds the radius of the balloon is r = 2.121568836 units? sec cm cm^2 cm^3 cm/sec cm^2/sec cm^3/sec . How fast is the radius changing after 100 seconds? dr dt = units? sec cm cm^2 cm^3 cm/sec cm^2/sec cm^3/sec