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討論串[微積] 一題證明
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Suppose that f is continuous at x = a. Given ε> 0,. there is δ>0 such that |f(a+h)-f(a)|<ε whenever |(a+h)-a|<δ.. For the reverse case, let x = a be a
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Given that lim g(x)=L ,where L>0. x->c. Prove that there exists an open interval (a.b) containing c,. such that g(x)>0 for all x (- (a,c)∪(c,b). 我的做法:
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