i dont even know where to begin with this?
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Originally Posted by pnfuller i dont even know where to begin with this? Originally Posted by pnfuller i dont even know where to begin with this? Actually that can't be done unless it says that $\displaystyle f$ is differentiable. If we assume that is what the question means then what if $\displaystyle \frac{d[-f(x-h)]}{dh}=~?$.
Since the problem says that f' (NOT f) is continuous, I think we can assume that f is differentiable! pnfuller, since the problem says "use L'Hopitals rule", perhaps you could begin by doing that?
Originally Posted by HallsofIvy Since the problem says that f' (NOT f) is continuous, I think we can assume that f is differentiable! It does not show $\displaystyle f'$ on this computer. It could be that the image is so dark. I wish we could ban posting questions as images.
Last edited by Plato; Oct 25th 2012 at 11:36 AM.
well how do you take the derivative of the numerator with all the different variables? Originally Posted by HallsofIvy Since the problem says that f' (NOT f) is continuous, I think we can assume that f is differentiable! pnfuller, since the problem says "use L'Hopitals rule", perhaps you could begin by doing that?
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