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Question


limx(x2+5x+3x2+x+2)x=

A
e4
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B
e3
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C
e2
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D
24
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Solution

The correct option is C e4
limx(x2+5x+3x2+x+2)x1form

=elimxx(x2+5x+3x2+x+21)

=elimxx(4x+1x2+x+2)

=elimxx2x2⎜ ⎜ ⎜4+1x1+1x+2x2⎟ ⎟ ⎟ ,[x,1x0]
=e4+01+0+0=e4

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