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The multiplicative inverse (reciprocal) of −3/7 is:
A3/7
B−7/3
C7/3
D1
Answer & Solution
Correct answer: B. −7/3
For a non-zero rational a, its multiplicative inverse is 1/a, so that a × (1/a) = 1. The reciprocal of −3/7 is −7/3, and indeed (−3/7) × (−7/3) = 1.
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