MCQ
જો $f(x) = \left\{ \begin{array}{l}1\,\,\,\,\,\,\,\,\,\,\,\,\,,\,\,\,\forall x < 0\\1 + \sin x,\,\,\,\forall 0 \le x \le \pi /2\end{array} \right.$ તો $f'(x)$ ની કિમત $x = 0$ આગળ મેળવો.
- A$1$
- B$-1$
- C$\infty $
- ✓અસ્તિત્વ નથી
$\therefore \,\,f'(x) = \left\{ \begin{array}{l}\,\,\,0,\,\,\,\,\forall \,x < 0\,({\rm{LHD}})\\\cos x,\,\,0 \le x \le \pi /2,\,\,({\rm{RHD}})\end{array} \right.$
$\therefore \,f'(0) = \left\{ \begin{array}{l}\,\,0\,\,\,\,,\,\,x < 0\\\cos 0 = 1\end{array} \right.$,
$\therefore \,f'(0)$ does not exist.
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