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Question

Find the value of k, if x1 is a factor of p(x)=kx22x+1

A
k=22
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B
k=2+2
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C
k=21
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D
k=2+1
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Solution

The correct option is C k=21
Since, x1 is factor of p(x)=kx22x+1
p(1)=0
Now,p(1)=k(1)22(1)+1=k2+1
So, k2+1=0
k=21

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