how do you show that the limit of a sequence exists? I forget. for example limx$\displaystyle _{x}$$\displaystyle \rightarrow$-1 $\displaystyle x^{3}$-3x. im having a brain fart please refresh my memory.
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That's not really a sequence. I'm going to guess that you're supposed to give an epsilon-delta proof of the continuity of $\displaystyle f(x)=x^3-3x$ at $\displaystyle x=-1$.
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