1.

The value of k for which (x + 2) is a factorof (x + 1)+ (3x + k)3 is(A)7(C)-11.(B) 7(D)-6- 3(7/3)

Answer»

x+ 2 is factor of polynomial p(x) = (x+1)^7 + (3x+k)³thenp(-2) = 0so(-2+1)^7 + (-6+k)³ = 0(k-6)³ = 1take cube root on both sidesk-6 = 1k = 7option (B) is correct

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