Integrate the given function over the given surface. G(x,y,z) = x over the parabolic cylinder y = x205x< 12,0sz<2 Integrate the function. Sfax.y.z) do=0 (Type an integer or a simplified fraction.)
Use spherical coordinates to calculate the triple integral of f(x, y, z) = y over the region x2 + y2 + z2 < 3, x, y, z < 0. (Use symbolic notation and fractions where needed.) S S lw y DV = help (fractions)
evaluate JJ. (< –Y) A. ) Integrate f(x, y, z) = x2 + y2 + 22 over the cylinder x2 + y2 < 2,-2 <2<3 (IL dx dy dz Feraluate
8), Let X and Y be continuous random variables with joint density function f(x,y)-4xy for 0 < x < y < 1 Otherwise What is the joint density of U and V Y
2. (20 marks) (a) Calculate the surface area of the graph of f(x,y) = x + 20y over the region R= {(x,y) e R2:1 < x < 4,2 sy s 2x} in the xy-plane. OV (b) Integrate the function g(x, y, z) = x +y +z over the surface that is described as follows: x = 2u – v, y = v + 2u, z= v – u Here u € [0,20), v € [0,21].
2. Suppose X and Y are continuous random variables with joint density function f(x, y) = 1x2 ye-xy for 1 < x < 2 and 0 < y < oo otherwise a. Calculate the (marginal) densities of X and Y. b. Calculate E[X] and E[Y]. c. Calculate Cov(X,Y).
Find Var(2X-Y)
Two random variables X and Y are i.i.d. and their common p.d.f. is given by f )- c(1+r) if 0 <r < 1. otherwise. f(3) = 10
Using the change of variables u = x2y and v = y/x, integrate
f(x,y) = x2y2 over the region bordered by y = 1/x2, y = 3/x2, y = x
and y = 2x.
3. Using the change of variables u = ry and v = y/x, integrate f(x,y) = r2y2 over the region bordered by y=1/x?, y = 3/r?, y = r and y=2r.
2. (2 points) Use the midpoint rule to estimate (7 – 2x – y)dA over the region D = {(x,y): -1 <r<2, -15y<2} partitioned using the lines x = 0, x = 1 and y = 0, y = 1. Take the sample points to be the midpoints of the sub-rectangles.
consider continuous joint density function f(x,y)= (x+y)/7; 1<x<2, 1<y<3 Marginal density for Y? Select one: (2+3x)/14 (3+2y)/7 (2+3y)/14 (3+2y)/14 consider continuous joint density function f(x,y)= (x+y)/7 ; 1<x<2, 1<y<3 P(0<x<3, 0<y<4)=? Select one: 0.5 1 0.15 0.25