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Question

The value of limx1x72x5+1x33x2+2 is.

A
0
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B
1
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C
1
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D
None of these
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Solution

The correct option is B 1
limx1x72x5+1x33x2+2
limx1x5(x21)(x51)x2(x1)2(x21)
=limx1x5(x+1)(x4+x3+x2+x+1)x22(x+1)
=1(1+1)(1+1+1+1+1)12(1+1)=33=1

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