Question:
(-5/7)-5 is equal to:
(a) (5/7)-5
(b) (5/7)5
(c) (7/5)5
(d) (-7/5)5
Solution:
(d) (-7/5)5
Explanation: (-5/7)-5=1/(-5/7)5=(-7/5)5
(By the law of exponents: a-n = 1/an)
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