Question

Given that f(x) = {3x^2 + 4 x<= -1
{7 -1 15 years ago

Answer 1

maybe at -1?

Answer 2

but maybe not. need to take limit from left and right.

Answer 3

on the other hand not really because by inspection
\[f'(x)=6x\] for x < -1 and
\[f'(x)=0\] for x > -1 and these do not match at -1

Answer 4

a) f (x) is everywhere differentiable
b) At x = 1
c) At x = -1
d) At x = -1 and at x = 1
e) At x = 7

Answer 5

at x = -1

Answer 6

I got that! yaay!!!

Answer 7

clear because the derivative from the right is 0 and from the left it is 6x good work!

Answer 8

yes, but why is x+7 differentiable>?

Answer 9

I see why!

Answer 10

nope, just lost it>>>