L7 極限的四則運算極限的多項式. 四則運算的定理If lim(x→c)f(x)=L, lim(x→c)g(x)= M, then lim(x→c) [f(x)+ g(x)]=L+M lim(x→c) [αf(x)]=αL lim(x→c) [f(x)g(x)]=LM.
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