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求sin(x^2-1)/(x-1)当x趋向于1的极限,给出讲解,
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当x趋向π lim (sin 3x )/( sin 2x) 的极限为?
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函数极限问题当x趋向1时,求[sin^2(x-1)]/(x-1)的极限求详细解释,