Q. 315.0( 2 Votes )

Out of the four o A. z6

B. z–6

C. z1

D. z4

Answer :

By laws of exponent,


(xm)n = xmn


In this question,


m = -2


n = 3


(xm)n = xmn


(z-2)3 = z-2×3


(z-2)3 = z-6


Hence, for a non-zero rational number z, (z-2)3 is equal to z-6.

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