# If X140 + 2x151 + K is Divisible By X + 1, Then the Value Of K Is - Mathematics

MCQ

If x140 + 2x151 + k is divisible by x + 1, then the value of k is

• 1

• -3

• 2

• -2

#### Solution

As  f(x) = x140 + 2x151 + k is divisible by (x +1).

i.e., (x+1)is a factor of f(x).

Therefore, f(-1) = 0

(-1)^140+2(-1)^151 + k =0

1 -2 +k =0

k=1

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#### APPEARS IN

RD Sharma Mathematics for Class 9
Chapter 6 Factorisation of Polynomials
Q 4 | Page 34