Lim(x→∞)(√x2+2x-x)求极值
求极限lim X→∞ [1+ x2/2 -√(1+ x2)]/(cos x –e x2 )sin x2 亲
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证明lim x→∞ x(根号x2-4根号完-x)=-2
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微积分求极限lim(x趋向无穷)(x2+(cosx)2-1)/(x+sinx)2=
求极限lim(x→∞)(√(x^2+x )-√(x^2-3x )).