Question

dear friends please help me to solve this questions.

Use Lagrange multipliers to find the maximum and minimum values of subject to the given constraints.
a) f(x,y)=x^2y; x^2+y^2=1
b) f(x,y,z)=x^2+2y^2+3z^2; x+y+z=1, x-y^2+2z=2

Answer 1

i think i know it