Question

Find the domain of the function f(x)=log base7(3-5x)

Answer 1

Here's a good thing to remember:

When given a log, the inside is not allowed to be 0 or less. It must be positive.

Answer 2

So if we have log(x + 3) for instance, we must force x + 3 > 0

Answer 3

the base isn't important, so try it out and post what you get.

Answer 4

so it would be 3-5x>0?

Answer 5

good first step! Now solve for x to get the domain. :)

Answer 6

okayn give me a sec and I will post

Answer 7

kk

Answer 8

would it be -3/5 or 3/5?

Answer 9

I got, 3 > 5x by adding 5x to both sides, then 3/5 > x