MCQ
$k$ ની . . . . કિમત માટે વિધેય $f(x) = \left\{ \begin{array}{l}k(2x - {x^2}),\;\;\;{\rm{when\,}}\,x < 0\\\,\,\,\,\,\,\,\,\,\cos x,\,\,\,\,\,\,{\rm{when\,}}\,x \ge {\rm{0}}\end{array} \right.$ એ $x = 0$ માટે સતત થાય.
- A$1$
- B$2$
- C$4$
- ✓એકપણ નહી.
$f(0 + ) = \mathop {\lim }\limits_{x \to 0 + } \,\cos x = 1$
$\therefore \,\,\,f(0) = \cos x = 1$
Hence no value of $k$ can make $f(0 - ) = 1.$
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