Y()落海干
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Y()落海干
![Y()落海干](/uploads/image/z/7678864-64-4.jpg?t=Y%EF%BC%88%EF%BC%89%E8%90%BD%E6%B5%B7%E5%B9%B2)
河落海干
【解释】比喻一点不剩.同“河涸海干”.
【出处】清·曹雪芹《红楼梦》第四十五回:“这会子你怕花钱,挑唆他们来闹我,我乐得去吃个河落海干,我还不知道呢!”
【解释】比喻一点不剩.同“河涸海干”.
【出处】清·曹雪芹《红楼梦》第四十五回:“这会子你怕花钱,挑唆他们来闹我,我乐得去吃个河落海干,我还不知道呢!”
Y()落海干
2.(x+y)²(x-y)²-(x-y)(x+y)(x²+y²)
1、(1-y)^2(1+y)(-1-y)
用行列式性质计算(需过程):(x,y,x+y; y,x+y,x; x+y,x,y )
-y/(y^2+1)dy不定积分
(x-y/x+2y)³
-{-[-(x-y)]}+{-[(x+Y)]}
1.((y+2x)(-2x+y)+4(x+2y)^2)/3y 2.(2(x-y)^3-8(x-y)^2(x+y)+6y(
(x+y)²(x-y)+(x+y)(x-y)²
运用平方差计算..(-x+y)(-x-y)(-x+y)(x+y)
(x-y)³(y-x)(y-x)²+(x-y)^6
(x-y)(x-2y)-(3x-2y)(x-3y)