Question

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Answer 1

Answer:

10/9

I hope it help you...

Answer 2

NOTE :- If the power of any rational number is negative then we have to reciprocal the particular rational number and then solve the sum related to it.

E.G = ( 2/3 ) ^ -2

= ( 3/2 ) ^ 2   { Reciprocaled the rational number to make its power positive }

= 9/4 (ans)

Your question

iii. ) ( 2/5 ) ^ -3

Reciprocal = 5/2

∴ ( 5/2 ) ^3

= 125 / 8 ( ans )