1/5/6都是
数学问题,校对已知下列不等式:(1)2x-1>0; (2)-1<9; (3)3x-2y<=-1(4)y×y+3y>5 (
2个回答
相关问题
-
数学问题: 1、若3x-2y+1=0,则13-9x+6y=( ) 2、已知丨x+y-3丨+(x-y)²=0,则
-
解下列方程组(1){y=1-x,4x-3y=5 (2){2x-y=3,3x+y-1=0 (3)2x+3y=-4,2x-4
-
已知变量x=-3,y=1.x=-2,y=1.5.x=-1,y=2.x=1,y=-2.x=2,y=-1.5.x=3,y=-
-
(1)利用基本不等式证明不等式:已知a>3,求证 a+4a?3≥7;(2)已知x>0,y>0,且x+y=1,求4x+9y
-
已知x/y=3/5.则在(1)(x-y)/(x+y)=1/4(2)(x+3)/(y+5)=3/5(3)x/(x+2y)=
-
y3-y2-y+1/y2-1 × x2-1/x3-x2-x+1 × x-1/y-1
-
已知|x+2|+(y-1/2)²=0,求代数式1/3x³-2x²y+3x²y+5
-
方程组2x+3y减2=0 4x减9y+1=0,x+1=5(y+2) 3(2x减5)减4(3y+4)=5
-
已知3x^2+xy-2y^2=0,求(1+2y^3/x^3-y^3)/((1+2y/x-y)
-
1.2x+3y-2=0 4x-9y+1=0 2.2x+y=2 3x-2y=10