就是比如. 任给epsilon,存在一个delta,当自变量和某数X0的差别小于delta时,因变量和L的差别就回小于epsilon,我们就说当x趋近于x0时,涵数的极限就是L
就是比如. 任给epsilon,存在一个delta,当自变量和某数X0的差别小于delta时,因变量和L的差别就回小于epsilon,我们就说当x趋近于x0时,涵数的极限就是L
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