你可能感兴趣的试题
={x|x2﹣2x﹣3>0}, ={x|lg(x﹣2)≤1},则(∁R.A.)∪B.=( ) A.(﹣1,12)B.(2,3) (2,3] [﹣1,12]
(3,-1),C.(2,-3)两点,D.点在直线3x-y+1=0上移动,则 点的轨迹方程为( ) A.3x-y-20=0B.3x-y-10=0 3x-y-9=0 3x-y-12=0
3J+5z-4=0 3x+y+5z-4=0 x-y+z-2=0 3x-7y+5z-4=0
x1=26.8%3; 1+2=x2 x3=0x12; x4=1+2=3;
(1,1)对称的直线的方程为( ) A.4x+3y-4=0 4x+3y-12=0 4x-3y-4=0 4x-3y-12=0
(3,-1),C.(2,-3)两点,D.点在直线3x-y+1=0上移动,则 点的轨迹方程为( ) A.3x-y-20=0B.3x-y-10=0 3x-y-9=0 3x-y-12=0
(0,3] [﹣4,3] [﹣4,0) [﹣4,0]
x=12,y=4 x=15,y=5 x=-12,y=-4 x=-15,y=-5
5x-y-3=0 14x-y-12=0 5x+y-3=0 14x+y-12=0
x1=26.8%3 1+2=x2 x3=0x12 x4=1+2=3;
2x+8y+12z+41=0 2x+8y+12z-41=0 2x-8y+12z+41=0 2x+8y-12z+41=0
12x+2(x﹣1)=12+3(3x﹣1) 12x+2(x﹣1)=12﹣3(3x﹣1)
12x﹣2(x﹣1)=12+3(3x﹣1) 12x﹣2(x﹣1)=12﹣3(3x﹣1)