(1)2X-1>0 X+1<3 (2)3(X-1)+13>2(5-X)怎么做?
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(1)2X-1>0 X+1<3 (2)3(X-1)+13>2(5-X)怎么做?
(1)2X-1>0 X+1<3 (2)3(X-1)+13>2(5-X)怎么做?
(1)2X-1>0 X+1<3 (2)3(X-1)+13>2(5-X)怎么做?
(1)2X-1>0 X+1<3
x>1/2,x0
x>0
(1)2x>1
2>1/2
(2)3x-3+13>10-2x
3x+10>10-2x
5x>0
x>0
(1):由2x-1>0推出:x>1/2; 由x+1<3推出:x<2;
所以:1/2
1、2>X>1/2
2、X>0
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