MCQ
જો $f(\mathrm{x})=|\mathrm{x}|$, તો $f^{\prime}(0)=\ldots \ldots . .$.
- A$0$
- B1
- Cx
- ✓એકપણ નહીં
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$ 2 x+7 y+\lambda z=3 $
$ 3 x+2 y+5 z=4 $
$ x+\mu y+32 z=-1$
ને અસંખ્ય ઉકેલો હોય, તો $(\lambda-\mu)=$...........