3/1(9y-3)+2(y+1)
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3/1(9y-3)+2(y+1)3/1(9y-3)+2(y+1)3/1(9y-3)+2(y+1)
3/1(9y-3)+2(y+1)
3/1(9y-3)+2(y+1)
3/1(9y-3)+2(y+1)
y (3y^2+8y-3)-6y(3y+2y-1)+9y
通分 y+3/y*y-6y+9,1/2y+6,y-1/y*y-9
已知7/3*根号(9y)-y-2y*1/y=-2,求y的值
解(y-3分之2y+y+3分之y)×y分之y²-9
3y(y-1)等于2(y-1)
计算:3y(y-4)(2y+1)-(2y-3)(4y²+6y-9)
(2y+1)(3y-1)+(2-y)(6y-1)
3(Y+1)^2-5(Y+1)(Y-1)+2(Y-1)^2,化简
方程5y(2y-3)=(y+2)(y-2)-1
3(y+1)>4y+2 2(y-1)≤3y 解不等式
(y+1)分之(2y+3)=(3y+4)分之(6y+7)
3/1(9y-3)+2(y+1)
0.33(9y-3)+2(y+1)
(y+3/y方+y)-(1/1-y)=4/y
三分之一(9y-3)+2(y+1)
三分之一(9y-3)+2(y+1)
已知y满足(y+1)/2-y>2+(y+2)/3,化简|y+1|+|2y-1|的结果是 A.-3y b.3y c.y d.-y+2
1、求下列微分方程的通解:(1)2y‘’+y‘-y=2ex (2)2y‘’+5y‘=5x2-2x-1 (3)y‘’-6y‘+9y=e3x(x+