Question

suppose F(x,y)=x^2-y^2. then the point (a,b) is a critical point of f(x,y):
a) whenever a=0,
b) whenever b=0
c) if (a,b)=(0,0)
d) all of the above

Answer 1

c)

Answer 2

that's what i thought. I got that as my critical point. just wanted to make sure. im guessing that a and b aren't necessarily true.

Answer 3

yes. they are both directly dependent upon each other.

Answer 4

thanks.

Answer 5

A dumb, contrived question; something they put on tests like AP and such; otherwise not very helpful.

Answer 6

Not referring to you drsidr13, but the people who make questions.