# Thread: Find x-intercept in log

1. ## Find x-intercept in log

I need to find the x-intercept of . It's (?, 0). Can't seem to find it . According to the graph:

The line doesn't cross the x-axis anywhere.

2. make y = 0 and solve for x.

Use $a^b= c \Rightarrow b = \log_ac$

3. Originally Posted by pickslides
make y = 0 and solve for x.

Use $a^b= c \Rightarrow b = \log_ac$
Did all that. Somehow got -2, which is incorrect ...

4. $0 = \log_5(x-1)+4$

$-4 = \log_5(x-1)$

$5^{-4} = x-1$

$5^{-4} +1= x$

$\frac{1}{5^{4}} +1= x$

Can you finish it?

5. Yes . Thanks! Got it. I should have known...