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Question

limx1(21x2+1x1)=___

A
12
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B
1
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C
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Solution

The correct option is A 12
limx1(21x2+1x1)=limx1(21x211x)=limx1(2(1+x)1x2)=limx1(1x1x2)=limx111+x=12

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