precalc

Solve the logarithmic equation for x. (Enter your answers as a comma-separated list.)
log2(x + 17) − log2(x − 2) = 1

2 is the base for the log.

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1. using our rules of logs , which you should have at your fingertips,

log2 ( (x+17)/(x-2) ) = 1
so
(x+17)/(x-2) = 2^1

solve for x , remember x> 2 for the log to be defined.

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posted by Reiny

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