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Use the definition of logarithm to simply each expression

log lower 10 ^10-4
11 years ago

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Steve
by definition, log_10(10^n) = n

so, log_10(10^-4) = -4

Or, you can recall that log x^n = n*logx
Since log_10(10) = 1, we again have -4*1 = -4
11 years ago

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