代数方程,（1）2x-1/x-3x/2x-1=2(2)2/x+y-1/x-y=7,1/x+y+1/x-y=-1(3)16/x-3+30/y+5=9,2/x-3+9/y+5=2

Question

代数方程,
（1）2x-1/x-3x/2x-1=2(2)2/x+y-1/x-y=7,1/x+y+1/x-y=-1(3)16/x-3+30/y+5=9,2/x-3+9/y+5=2

Answer 1

兄弟.根据我的经验来个主观推测,题应该有很多括号没加吧?(1)(2x-1)/x-3x/(2x-1)=2.(2x-1)²-3x²=2x(2x-1)4x²-4x+1-3x²=4x²-2x.3x²+2x-1=0(3x-1)(x+1).∴x1=1/3,x2=-1.(2)2/(x+y)-1/(x-...