SSC CGL Tier II 12 Apr 2015 Paper

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Question : 25 of 100

Marks: +1, -0

When

x ^m

is multiplied by

x ^n

, product is 1. The relation between m and n is

mn = 1
m = n
m + n = 1
m = – n

Solution:

(4)

x^{m}× x^{n}=1

⇒ x^{m+n}=x^{0}

⇒ m+n=0

⇒ m=-n

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