求极限lim x->5 (x sin (2/x))
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求极限 lim sin(x^2 * sin (1/x))/x x->0
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求极限 ((sin(x^3+x^2-x)+sin x) /x x→0 已知lim sinx/x=1
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求极限lim(x→∞)(sin√x+1-sin√x)
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求Lim(x->0)[sin(x/2)+cos2x] 的极限