Question

Which of the following expressions is equivalent to the expression below?

log 7x4

Answer 1

http://www.purplemath.com/modules/logrules.htm

Answer 2

A. log 7 - 4 log x
B. 4 log 7 + log x
C. 4 log 7 - log x
D. log 7 + 4 log x

Answer 3

those are the answers it gives

Answer 4

I think its B but I would double check. Its been a while since Ive done this.

Answer 5

this is \[\log 7x^4\]
right?

Answer 6

yeah

Answer 7

The correct answer is D

Answer 8

Review and memorize log rules.

\[ \log x^4 = 4 \log x\]

You can rewrite exponets in front

Answer 9

But you have to keep whatever was raised to the power attached, which is important in this problem.

What I mean is that it has to be 4 log x because the x was raised to the 4. It cant be 4 log 7 by itself.