Question 4(iv)
Find the multiplicative inverse of the following:
$\frac{- 5}{8} \times \frac{- 3}{7}$

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Solution

We know that multiplicative inverse of a rational number a is $(\frac{1}{a}), s u c h t h a t a \times \frac{1}{a} = 1$ .
Multiplicative inverse of $\frac{- 5}{8} \times \frac{- 3}{7} = \frac{15}{56} i s \frac{56}{15}$ .

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Question 14
The multiplicative inverse of $- 1 \frac{1}{7}$ is
(a) $\frac{8}{7}$
(b) $\frac{- 8}{7}$
(c) $\frac{7}{8}$
(d) $\frac{- 7}{8}$

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