I'll let <em>h</em> = <em>ax</em>, so the limit is

i.e. the derivative of
.
Expand the numerator to see several terms that get eliminated:

So we have

Since <em>h</em> ≠ 0 (because it is approaching 0 but never actually reaching 0), we can cancel the factor of <em>h</em> in both numerator and denominator, then plug in <em>h</em> = 0:

Answer:
6
Step-by-step explanation:
I'm so sorry...i solved this on a calculator so i'm not so sure how to explain once again i'm sorry.