Let u(x, y) be the 2-variable function u(x, y) = (x + 2)y − exp(x + y). (a) Find the partial derivatives ux, uy, uxx, uyy, and show that uxy = uyx.
(b) Show that u has a stationary point for y = 1. Determine the corresponding value
of x and the character of the stationary point.

2 is the final ! : )

answer

d. 10

explanation

the distance from point y to wx is the height of the triangle.

using pythagoras theorem,

group similar terms to get,

this implies that,

take positive square root of both sides to get,

this implies that,

nswer: a   y-axis

step-by-step explanation: