1题:5/x-1=1/x+3 2题:1-x/2-x减3/x-2=2 3题:2/x+1减1/x-1=4x/x²-1 4题:2/x+3加3/2=7/2x+6
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1题:5/x-1=1/x+3 2题:1-x/2-x减3/x-2=2 3题:2/x+1减1/x-1=4x/x²-1 4题:2/x+3加3/2=7/2x+6
1题:5/x-1=1/x+3 2题:1-x/2-x减3/x-2=2 3题:2/x+1减1/x-1=4x/x²-1 4题:2/x+3加3/2=7/2x+6
1题:5/x-1=1/x+3 2题:1-x/2-x减3/x-2=2 3题:2/x+1减1/x-1=4x/x²-1 4题:2/x+3加3/2=7/2x+6
1题:5/x-1=1/x+3
5(x+3)=x-1
5x+15=x-1
5x-x=-15-1
4x=-16
x=-4
2题:1-x/2-x减3/x-2=2 两边乘x-2
x-1-3=2(x-2)
x-4=2x-4
2x-x=4-4
x=0
3题:2/x+1减1/x-1=4x/x²-1 两边乘(x+1)(x-1)
2(x-1)-(x+1)=4x
2x-2-x-1=4x
x-3=4x
4x-x=-3
3x=-3
x=-1
4题:2/x+3加3/2=7/2x+6 两边乘2(x+3)
4+3(x+3)=7
3x+9+4=7
3x=7-13
3x=-6
x=-2
题目中分子分母表述的不清楚,
1)4/x=4,x=1;(2)1-11x/6=2,x=-6/11;(3)1/x=4/x-1,x=3;(4)3/2x=3+3/2-6,x=-1
1题:5/x-1=1/x+3
5(x+3)=x-1
5x+15=x-1
5x-x=-15-1
4x=-16
x=-4
2题:x-1-3=2(x-2)
x-4=2x-4
2x-x=4-4
x=0
3题:2(x-1)-(x+1)=4x
2x-2-x-1=4x
x-3=4x
4x-x=-3
3x=-3
x=-1
4题:4+3(x+3)=7
3x+9+4=7
3x=7-13
3x=-6
x=-2
解如图:
1题 2题
5/X-1=1/X+3 1-x/2-x减3/x-2=2
5/X-1/X=3+1 1-X方/4X-4X方/4X-12X/4X方-2=2
4/X=4 3X=- 32
X=1 ...
全部展开
1题 2题
5/X-1=1/X+3 1-x/2-x减3/x-2=2
5/X-1/X=3+1 1-X方/4X-4X方/4X-12X/4X方-2=2
4/X=4 3X=- 32
X=1 X=- 32/3
3题 2/x+1减1/x-1=4x/x²-1
公式忘了
原来解这个就是玩,年头多忘啦
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