Question:
The multiplicative inverse of $-1 \frac{1}{7}$ is
(a) $8 / 7$
(b) $-8 / 7$
(c) $7 / 8$
(d) $7 /-8$
Solution:
(d) $7 /-8$
$=-1 \frac{1}{7}=-8 / 7$
$=7 /-8$ $[\because$ reciprocal $]$
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