4. (a Let (sin( x cos( ) dr + (x cos(x + y) - 2) dy. dz= Show that dz is an exact differential and determine the corresponding function f(x,y) Hence solve the differential equation = z sin( Cos( y) 2 x cos( y) dy 10] (b) Find the solution of the differential equation d2y dy 2 y e dx dæ2 initial conditions th that satisfi 1 (0) [15] and y(0) 0 4. (a Let (sin( x cos( ) dr...
how do i solve this? For f(x, y), find all values of x and y such that f (x, y) = 0 and f (x, y) = 0 simultaneously. f(x, y) = In(4x² + 2y2 + 8)
Thank you to any who can help. - Let f(x, y) = sin r cos y +2.14 and let C be the path in the ry plane that follows the arc of y = sin x from 6, 1) to (7,0). Then (a) Find the gradient of f, that is, find F=Vf. (b) Explain why Green's Theorem cannot be applied to find | F. dr Jc (c) Use a different method to find F. dr
. Let f(x) = 22,3 + 5 sin x + 4 cos x. Find (Ji ),(4) 1 . Let f(x) = 22,3 + 5 sin x + 4 cos x. Find (Ji ),(4) 1
Questions 1 and 2 1. Find the gradient of f(I, y) = sin(Zy+5). 2. Let f(x, y, z) - ryz + x) (a) Find the gradient of f. (b) Find an equation of the tangent plane to the level surface ryz + 2 = 5 at the point (2,1,1).
Q6 [10+1+3=14 Marks] Let F be a force field given by F(x, y) = y2 sin(xy?) i + 2xy sin(xy?)j. (a) Show that F. dr is exact by finding a potential function f. (b) Is I = S, y2 sin(xy2) dx + 2xy sin(xy?) dy independent of path C? Justify your answer. (c) Use I to find the work done by the force field F that moves a body along any curve from (0,0) to (5,1).
Find the range of the following functions Please solve without using calculus (vii) f(x)sin (sin x) (viii f(x) cos (cos x) (ix) f(x)sin (sin x)cos (sinr) (x) f(x) cos (sin x)sin (cos x) (vii) f(x)sin (sin x) (viii f(x) cos (cos x) (ix) f(x)sin (sin x)cos (sinr) (x) f(x) cos (sin x)sin (cos x)
I found that the critical numbers do not exist. How do I solve this? 6. Let f(x) = 2x. Then, f'(x) = 18 +2,and f"(x) = 4*12 - (9-x)? (9-x2) (a) Use a number line to demonstrate where ſ is increasing/decreasing. Label it carefully. (b) Use a number line to indicate the concavity of f. Label it carefully. (c) Compute lim 2x (d) List any intercepts and/or asymptotes for f. (e) Using all of the information above, carefully sketch a...
Let F(x, y, z) = sin yi + (x cos y + cos z)j – ysin zk be a vector field in R3. (a) Verify that F is a conservative vector field. (b) Find a potential function f such that F = Vf. (C) Use the fundamental theorem of line integrals to evaluate ScF. dr along the curve C: r(t) = sin ti + tj + 2tk, 0 < t < A/2.
#4 plz 3. Let F(x, y, z) = (2xyz + sin x)i + x²zj + x²yk. Find a function f such that F = Vf. 4. Evaluate F.ds, where c(t) = (cost, sint, 4), 0 <t<t, and F is as in Exercise 3.