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Question

The value of f(0), so that the function f(x)=1+x31+xx is continuous at x=0 is

A
16
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B
13
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C
12
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D
23
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Solution

The correct option is A 16
For continuity of f(x) at x=0, we must have,
f(0)=limx0f(x)=limx0(1+x31+xx)=limx0(1+x)1/2(1+x)1/3x [00 form]
=limx0{12(1+x)1/213(1+x)2/3}=1213=16

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