1.

(-5/7)-5 is equal to:(a) (5/7)-5 (b) (5/7)5 (c) (7/5)5 (d) (-7/5)5

Answer»

(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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