The partial derivative of the function

$$f(x, y, z) = e^{1-x\cos y} + xze^{-1/(1+y^{2})}$$

with respect to $x$ at the point $(1,0,e)$ is

1. $-1$
2. $0$
3. $1 \\$
4. $\dfrac{1}{e}$
in Others
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