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## anonymous 3 years ago $$\ \large \frac{dy}{dx} e^{-x}+xe^{-x}$$ ?

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1. anonymous

Is this derivative with first term only??

2. anonymous

That's not an equation, it's an expression and so in this state is useless

3. anonymous

It is totally useful: $-e^{-x} +x \cdot e^{-x} \implies e^{-x}(x-1)$

4. anonymous

Only if you've got the problem.

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