Sunday, 20 August 2017

calculus - Limit Proof Question

How to prove lim if g(x) is not equal to 0 using \epsilon-\delta definition. I know the proof that uses the idea of \frac{1}{g(x)} and the uses multiplication rule of limit, but I am wondering if there is a direct and more elegant proof.

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real analysis - How to find lim_{hrightarrow 0}frac{sin(ha)}{h}

How to find \lim_{h\rightarrow 0}\frac{\sin(ha)}{h} without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...