作业帮求解lim(x趋向于正无穷)x^1/2•[(a+x)^1/2-x^1/2]
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求解lim(x趋向于正无穷)x^1/2•[(a+x)^1/2-x^1/2]
求解lim(x趋向于正无穷)x^1/2•[(a+x)^1/2-x^1/2]
求解lim(x趋向于正无穷)x^1/2•[(a+x)^1/2-x^1/2]
(a+x)^1/2-a^1/2=a/(根号下(a+x)-a^1/2).然后把x^1/2除下去 答案是a/2