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Question

If (P21)x2+(P1)x+(P24P+3)=0 is an identity in x, then the value of P is

A
1
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B
2
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C
1
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D
0
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Solution

The correct option is A 1
Conditions:
P21=0P=±1(1)P1=0P=1(2)P24P+3=0(P3)(P1)=0P=1,3(3)
From equation (1),(2) and (3),
P=1

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