1/x+1 +2/x-2 =8/x²-4

问题描述:

1/x+1 +2/x-2 =8/x²-4

答案是-4/31/(x+1) +2/(x-2) -8/(x²-4)=0,分母最小公倍数为(x+1)(x-2)(x+2) ,将分母变成一样的,即(x+2)(x-2)/((x+1)(x-2)(x+2) )+ 2(x+1)(x+2)/((x+1)(x-2)(x+2) )-8(x+1)/((x+1)...