MCQ
$e ^{ x }+ e ^{ y }= e ^{ x + y }$ તો $\frac{ dy }{ dx }=\ldots \ldots \ldots$.
- ✓$- e ^{ y - x }$
- B$- e ^{ x - y }$
- C$e^{y-x}$
- D$e^{x-y}$
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