1.

The reciprocal of (2/5)-1 is:(a) 2/5 (b) 5/2 (c) –5/2 (d) –2/5

Answer»

(b) 5/2

Explanation: By the law of exponent we know: a-n = 1/an.

Hence, (2/5)-1

= 1/(2/5)

= 5/2



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