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Closure Property of Rational Numbers

Question [-32...

Question

Question 1

$[(- 3)^{2}]^{3}$ is equal to
(a) $(- 3)^{8}$
(b) $(- 3)^{6}$
(c) $(- 3)^{5}$
(d) $(- 3)^{23}$

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Solution

We know that, if 'a' is a rational number, m and n are natural numbers, then
$(a^{m})^{n} = a^{m \times n} S o, [(- 3)^{2}]^{3} = (- 3)^{2 \times 3} = (- 3)^{6}$

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Closure Property of Rational Numbers

Standard VIII Mathematics

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