Hello

I had following exercise at my exam last wednesday:

Find the nominal value and the place of the maxmum and the minimum of the function f(x,y,z) = x + y + z^2

on the area of the ball with (x^2 + y^2 + z^2 <= 1) ....

can please someone help me. just wanna check if i did it right...

thank you guys!!!

ps: sorry if my expressions arn't correct... hope you understand what i mean tho.... im swiss