## anonymous 3 years ago Having trouble with a problem: "Use difference quotients with $\Delta x=0.1$ to estimate $f _{x}(2,1)$ where $f(x,y)=e ^{-x}\sin(y)$ . As far as I know I should be using the formula $\frac{ f(a+h, b)-f(a,b) }{ h }$ I've come up with (.103-.114)/.1 which is approx -.11, but apparently that is wrong? Am I using the wrong forumula, or just missing a step? Any help?

1. anonymous

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2. anonymous

Thanks you