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Math Help - Bonus Logarithem Question

  1. #1
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    Exclamation Bonus Logarithem Question

    If 3*logb(2) + logb(5) - logb(c) = 0, then find c?
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  2. #2
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    Quote Originally Posted by Mr_Green View Post
    If 3*logb(2) + logb(5) - logb(c) = 0, then find c?
    c = 40; I'll show the solution when I return, unless by that time someone has already.
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  3. #3
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    Quote Originally Posted by Mr_Green View Post
    If 3*logb(2) + logb(5) - logb(c) = 0, then find c?
    \log_b 2^3+\log_b 5-\log_b c=0
    \log_b (8\cdot 5/c)=0
    Thus,
    b^0=1=40/c
    Thus,
    c=40
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  4. #4
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    i think i see it logb(2^3) + logb (5) - logb(c)

    logb(8) + logb(5) -logb(c) =0

    logb(40) =logb(c) = 0


    so c = 40
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