Question #775f0

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Question #775f0

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Answer 1 · 2017-11-26T05:09:33

$x = 6.32$ $x=6.32$

Explanation:

$40 = 2^{x - 1}$ $40=2^(x-1)$
$log 40 = {log 2}^{x - 1}$ $log40=log2^(x-1)$
$log 40 = (x - 1) log 2$ $log40=(x-1)log2$
$log 40 = x log 2 - log 2$ $log40=xlog2-log2$
$log 40 + log 2 = x log 2$ $log40+log2=xlog2$
$\frac{log 80}{log 2} = x$ $log80/log2=x$
$x = 6.32$ $x=6.32$

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Question #775f0

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