Question

For f(x) = x^3 – 4x – 7, use the Intermediate Value Theorem to determine which interval must contain a zero of f.

Answer 1

Read my previous answer, given about three days ago. Last time, you (or someone else) gave four intervals and I told you which one had the zero.

Answer 2

My previous answer is at:
http://www.jiskha.com/display.cgi?id=1248395006

I described how to get the answer there.