【数学分式计算题,要过程】(3y²)分之(2x²)*(6x)分之(5y)+(21x...
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发布时间:2024-10-24 09:54
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时间:2024-11-17 15:18
1、2x²/3y²×5y/6÷10y/21x²
=5x/9y×21x²/10y
=7x³/6y²
2、(a+2)/a(a-2)×(a-2)²/(a+2)
=(a-2)/a
3、2a/(a+2)(a-2)-(a+2)/(a+2)(a-2)
=(2a-a-2)/(a+2)(a-2)
=1/(a-2)
4、(a+1)²/(a+1)(a-1)-1/(a-1)
=(a+1)/(a-1)-1/(a-1)
=a/(a-1)