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Question

The equation 2sin2x(p+3)sinx+2p2=0 possesses a real solution, if

A
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B
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C
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D
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Solution

The correct option is B
2sin2x(p+3)sinx+2p2=0
sinx=(p+3)±(p+)28(2p2)4
sinx=(p+3)±(p5)4=p12,2
1p1212p12
1p3

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