Q.

The value of the limit limx→0ax-a1/xax+a1/x, a>1, is

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a

4

b

2

c

-1

d

0

answer is C.

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Detailed Solution

limx→0ax-a1/xax+a1/x, a>1 Put r = t2. Then limt→0 at-a1/tat+a1/t or  limx→0 at-1/t-1at-1/t+1=a-∞-1a-∞+1=0-10+1=-1
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