求极限,lim x→2 sin(x-2)÷x平方-4
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求lim x→0时(2+e^ 1/x / 1+ e^ 4/x + sin x / |x| )的极限...
lim x->0(sqrt(sin(1/x^2)) 求极限
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求极限 lim sin(x^2 * sin (1/x))/x x->0
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