(1/a+1/b)(4a+b)/30=(1/30)(b/a+4a/b+5)怎么转化的?
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![(1/a+1/b)(4a+b)/30=(1/30)(b/a+4a/b+5)怎么转化的?](/uploads/image/z/3745452-12-2.jpg?t=%281%2Fa%2B1%2Fb%29%284a%2Bb%29%2F30%3D%281%2F30%29%28b%2Fa%2B4a%2Fb%2B5%29%E6%80%8E%E4%B9%88%E8%BD%AC%E5%8C%96%E7%9A%84%3F)
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(1/a+1/b)(4a+b)/30=(1/30)(b/a+4a/b+5)怎么转化的?
(1/a+1/b)(4a+b)/30=(1/30)(b/a+4a/b+5)怎么转化的?
(1/a+1/b)(4a+b)/30=(1/30)(b/a+4a/b+5)怎么转化的?
先把括号展开
(1/a+1/b)(4a+b)/30
=(1+b/a+4a/b+4)/30
=(1/30)(b/a+4a/b+5)