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3(2^(2x+1)+5(2^(-x) )= 31

What I did first was to take the logarithim on both sides of the equation.... to solve for x. But that apparantly isn't a "logical" way to proceed. Any advice?

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- Thread starter itzela
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- #1

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3(2^(2x+1)+5(2^(-x) )= 31

What I did first was to take the logarithim on both sides of the equation.... to solve for x. But that apparantly isn't a "logical" way to proceed. Any advice?

- #2

matt grime

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[3(2^(2x+1))]+[5(2^(-x)] = 31

^ means to the power of ...

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- #5

matt grime

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- #7

HallsofIvy

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But then you start asking about solving for x- which has nothing to do with finding a domain. If that really is the problem, dp what Eighty suggested: let t= e

Hint: e

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