Graph of Function F/F'

**FalconPUNCH!** · October 10th 2007, 04:46 PM

So my question is how do I sketch a graph for the F' with the equation f(x) = lnx ? I graphed f(x) but I don't know where to go from there.

**ThePerfectHacker** · October 10th 2007, 05:02 PM

Originally Posted by FalconPUNCH!

So my question is how do I sketch a graph for the F' with the equation f(x) = lnx ? I graphed f(x) but I don't know where to go from there.

Are you going to $F(x) = \frac{f(x)}{f'(x)}$ then $F(x) = \frac{\ln x}{\frac{1}{x}} = x\ln x$ .

**FalconPUNCH!** · October 10th 2007, 05:09 PM

Originally Posted by ThePerfectHacker

Are you going to $F(x) = \frac{f(x)}{f'(x)}$ then $F(x) = \frac{\ln x}{\frac{1}{x}} = x\ln x$ .

My professor wants us to graph F' without an equation. He wants us to use the graph of f(x) to graph F'. I'm confused and don't really know what to do for f(x) = lnx

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