填空x/(3x+1)=(3x²-x)/(ax²-1)成立的条件是______________.化简(a²b的三次方)/(x²-2x+1)÷(6ab)/(1-x²) * 1/(ab)² =__________.已知x-1与y+2互为负倒数,则 y的﹣1次方- x的-1次方=________.

填空x/(3x+1)=(3x²-x)/(ax²-1)成立的条件是______________.化简(a²b的三次方)/(x²-2x+1)÷(6ab)/(1-x²) * 1/(ab)² =__________.已知x-1与y+2互为负倒数,则 y的﹣1次方- x的-1次方=________.
填空
x/(3x+1)=(3x²-x)/(ax²-1)成立的条件是______________.
化简(a²b的三次方)/(x²-2x+1)÷(6ab)/(1-x²) * 1/(ab)² =__________.
已知x-1与y+2互为负倒数,则 y的﹣1次方- x的-1次方=________.

填空x/(3x+1)=(3x²-x)/(ax²-1)成立的条件是______________.化简(a²b的三次方)/(x²-2x+1)÷(6ab)/(1-x²) * 1/(ab)² =__________.已知x-1与y+2互为负倒数,则 y的﹣1次方- x的-1次方=________.
1) a=9 x不等于正负1/3
2) -（x+1）/6a(x-1)
3) 3/[k*(k-3)] k为任意自然数且k不等以0,1,3

a=9

1、 a=9 x不等于正负1/3
2、 -（x+1）/6a(x-1)
3、

1、a=9; x≠0
2、（1+x)÷{6a(x-1)}
3、3/[k*(k-3)] k为任意自然数且k不等以0,1,3