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分式的混合运算搞不懂是分开乘还是(a/1-b/1)/a²-b²/ab化简(1-Y/Y+X9/X/Y²-X²
题目内容:
分式的混合运算 搞不懂是 分开乘 还是
(a/1-b/1 ) / a²-b²/ab 化简 ( 1- Y/Y+X9 / X / Y²-X²优质解答
[(1/a)-(1/b)]÷[(a²-b²)/(ab)]
原式=[(b-a)/ab]·[(ab)/(a+b)(a-b)]
=[ab(b-a)]/[ab(a+b)(a-b)]
=-[1/(a+b)]
1-[y/(y+x)]÷[x/(y²-x²)]
原式=1-[y/(y+x)]·[(y+x)(y-x)/x]
=1-[y(y+x)(y-x)/x(y-x)]
=1-[(y-x)/x]
=-(y/x)
(a/1-b/1 ) / a²-b²/ab 化简 ( 1- Y/Y+X9 / X / Y²-X²
优质解答
原式=[(b-a)/ab]·[(ab)/(a+b)(a-b)]
=[ab(b-a)]/[ab(a+b)(a-b)]
=-[1/(a+b)]
1-[y/(y+x)]÷[x/(y²-x²)]
原式=1-[y/(y+x)]·[(y+x)(y-x)/x]
=1-[y(y+x)(y-x)/x(y-x)]
=1-[(y-x)/x]
=-(y/x)
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