Question

Calculus Help!!
Find the absolute minimum and absolute maximum of f(x,y)=2x^3+y^4 on the set D=｛（x,y）:x^2+y^2≦1｝

Answer 1

X^2+y^2>=0
min is 0
max is 2

Answer 2

how do you deal with D=｛（x,y）:x^2+y^2≦1｝?

Answer 3

because this expression can't be negative

Answer 4

if you ever put negative number as y or x it'll become positive