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数学题求解!先化简,再求值.

题目详情
数学题求解!先化简,再求值.

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答案和解析
[3/(x-2)+2/(x+2)] ÷ [(5x²+2x)/(x²-4)]
=[3(x+2)+2(x-2)]/[(x-2)(x+2)] ÷ [x(5x+2)/(x²-4)]
=[(5x+2)/(x²-4)] ÷ [x(5x+2)/(x²-4)]
=1/x
因为x=√6/3
所以原式=3/√6=√6/2