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JAMB Mathematics 2020 Paper

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Question : 15

Total: 40

What is the product of

\frac{27}{5}

(3)^{-3}

\left(\frac{1}{5}\right)^{-1}

?

5
3
1
$\frac{1}{25}$

Solution:

$\frac{27}{5} \times 3^{-3} \times \frac{(1)^{-1}}{5}$

= $\frac{27}{5} \times \frac{1}{3^3} \times \frac{1}{\frac{1}{5}}$

$\frac{27}{5}$ x $\frac{1}{27}$ x $\frac{5}{1}$ = 1

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