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I am currently having problems with a similar question, and used that post, but I'm finding it hard to solve for x.

the question states. if f(x) = 1/x for every x > 0, there is a positive quantity e (epsilon), find the d(delta) quatity such that

if 0 < l x - 3 l < d, then l 1/x - 1/3 l < e

i simplify l 1/x - 1/3 l < e to l (x - 3)/ 3x l < e, i put the x - 3 in brackets to show that is all over the 3x

then show the relation between d = e, which is if l x - 3 l < d, and l (x - 3)/3x l < e

then l d/3x l = e.

I think I am almost there just need a couple pointers in the right direction i believe.

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# Homework Help: Epsilon and Delta Proof

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