Question

Evaluate:-
Ch-exponents and powers
Class-8
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Answer 1

Question:-

$\mapsto$ Evaluate $\sf \{ ({ \frac{1}{4}) }^{ - 1} - {( \frac{1}{5}) }^{ - 1} \}^{ - 1}$

Answer:-

$\mapsto$ The answer is -1

Solution:-

$\sf \{ ({ \frac{1}{4}) }^{ - 1} - {( \frac{1}{5}) }^{ - 1} \}^{ - 1}$

$\sf = \{4 - 5 \}^{ - 1}$

$\sf = { - 1}^{ - 1}$

$\sf = - 1$

Formulae Used:-

$\sf \mapsto {a}^{ - b} = \frac{1}{ {a}^{b} }$

Answer 2

Answer:

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