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JAMB Mathematics 2018 Paper

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Question : 58

Total: 62

Simplify 25

\frac{1}{2}

\frac{-2}{3}

1 $\frac{1}{4}$
2 $\frac{1}{4}$
6
10

Solution:

Using law of indices

25 $\frac{1}{2}$ × 8 $\frac{-2}{3}$

= √25 x ( $\sqrt[3]{8}$ ) -2

= 5 x 2-2

= 5 x $\frac{1}{2^2}$ =

$\frac{5}{4}$ = $\frac{11}{4}$

Answer is A

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