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Q.

⨍  : R-0 → R given by ⨍ (x)=1x-2e2x-1 can be made continuous at x=0 by defining f(0) is

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a

2

b

1

c

-1

d

0

answer is A.

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Detailed Solution

f(x)=1x-2e2x-1, f is continuous at x=0 limx0f(x) existslimx0f(x)=limx01x-2e2x-1 =limx0e2x-1-2xxe2x-1 =limx0e2x-1-2x2x2 since limx0e2x-12x=1 =limx02e2x-24x existsf(0)=limx0f(x)=2e2x-122x=1   

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