Jambmaths question:
Find the value of x for which $2({{3}^{2x-1}})=162$
Option A:
$\tfrac{1}{2}$
Option B:
$\tfrac{2}{5}$
Option C:
$\tfrac{3}{2}$
Option D:
$\tfrac{5}{2}$
Jamb Maths Solution:
$\begin{align} & 2({{3}^{2x-1}})=162 \\ & {{3}^{2x-1}}=81 \\ & {{3}^{2x-1}}={{3}^{4}} \\ & 2x-1=4 \\ & x=\tfrac{5}{2} \\\end{align}$
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