Let be a real number

MATHEMATICS · Single correct · CBSE · Mathematics · Quadratic Equations · Quadratic Equations

Problem

Let

k

be a real number. The function

f(x)=\dfrac{x+1}{x^{2}-4kx+k^{2}}

is undefined at exactly one real value of

x

. Which of the following is the corresponding value of

k

? (a)

k=1

(b)

k=-2+\sqrt{3}

(c)

k=0

(d)

k=2