((4/X²-4)+(1/X+2))/(1/X-2)

问题描述:

((4/X²-4)+(1/X+2))/(1/X-2)

楼主,问题稍有不清楚.我的理(4/(x方-4)+1/(x+2))/(1/(x-2))这样答案是1.解法:先算分数线上半部分(x方-4) 可化为(x+2)×(x-2),把1/(x+2)通分,分子分母同乘(x-2),得(x-2)/(x+2)(x-2).分子相加,得(...