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Math Help - Find x-intercept in log

  1. #1
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    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.
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  2. #2
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    make y = 0 and solve for x.

    Use a^b= c \Rightarrow b = \log_ac
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  3. #3
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    Quote Originally Posted by pickslides View Post
    make y = 0 and solve for x.

    Use a^b= c \Rightarrow b = \log_ac
    Did all that. Somehow got -2, which is incorrect ...
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  4. #4
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     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?
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  5. #5
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    Yes . Thanks! Got it. I should have known...
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