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I am hoping someone can help me understand something. I was watching one of the MIT OCW videos and it ran through the following

Δf/Δx = (1/(x_{0}+Δ_{x}- 1/x_{0})) / Δ_{0}

can be rewritten as

Δf/Δx = 1/Δ_{x}(x_{0}-(x_{0}+Δ_{x}) / (x_{0}+Δ_{x})x_{0})

But I am not sure how this was done.

I hope someone can help me with this.

Thanks in advance.

Seán

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# Homework Help: Trying to understand rewritten equation

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