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Question

Solve limx031+x2412xx+x2 is equal to

A
14
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B
12
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C
1
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D
4
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Solution

The correct option is A 4
limx0(1+x2)3/2(12x)2x+x2

Apply L-Hospital Rule
limx032(1+x2)1/2(2x)2(12x)(2)1+2x

=0+4(12(0))1+2(0)=4

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