- #1
Tiome_nguyen
- 5
- 0
Hello everyone, i have 2 problems in my multivariable calculus homework that i can't solve . Please help me out, thank you so much
1/f(x,y)= [(x^2) -2y]^(0.5)
a) Find directional derivatives of f at (2,-6) in the direction of <-4,3>
b) Find equation of the tangent plane to the function f(x,y) in problem 1 at the point (2,-6)
i got the part a) and but i have no idea how to do part b)
2/
a)Use Lagrange multipliers to find max and min of function P(x,y) = x(y^2) +(x^3)y-5xy subject to the constraint boundaries xy = 4 , y = x+3 , y = x-3
b) find absolute maximum and minimum on the region bounded by xy <= 4, x-3 <= y <= x+3 .
i spent an hour for this problem but couldn't solve for it
1/f(x,y)= [(x^2) -2y]^(0.5)
a) Find directional derivatives of f at (2,-6) in the direction of <-4,3>
b) Find equation of the tangent plane to the function f(x,y) in problem 1 at the point (2,-6)
i got the part a) and but i have no idea how to do part b)
2/
a)Use Lagrange multipliers to find max and min of function P(x,y) = x(y^2) +(x^3)y-5xy subject to the constraint boundaries xy = 4 , y = x+3 , y = x-3
b) find absolute maximum and minimum on the region bounded by xy <= 4, x-3 <= y <= x+3 .
i spent an hour for this problem but couldn't solve for it