Number of possible integral values of \( p \) so that the equation \( 2 \cos ^{2} x-(p+3) \cos x...

Описание

Number of possible integral values of \( p \) so that the equation \( 2 \cos ^{2} x-(p+3) \cos x+2(p-1)=0 \) possesses a real solution is
(A) 4
(B) 6
(C) 5
(D) 7
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