The value of k for which $x^{2} - 4 x + k = 0$ has coincident roots, is

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Solution

The correct option is A 4
$T h e g i v e n e q u a t i o n i s x^{2} - 4 x + k = 0. A l s o r o o t s a r e c o i n c i d e n t . ∴ D i s c r i m i n a n t = 16 - 4 k = 0 \Rightarrow 4 k = 16 \Rightarrow k = 4 (A n s)$

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