Answer
(a) $x=\frac{\log 34}{3\log 2}$
(b) $x\approx 1.695821$
Work Step by Step
(a) We need to solve:
$2^{3x}=34$
We take the log of both sides and use log rules to simplify:
$\log 2^{3x}=\log 34$
$3x \log2 = \log 34$
$3x=\frac{\log 34}{\log 2}$
$x=\frac{\log 34}{3\log 2}$
(b) We solve using a calculator:
$x\approx 1.695821$