问题补充:
4个通分得题目..急./my%5Fbest%5Flove%5F4%5Fu/pic/item/30f0d1cb15cdb1ec52664f35.jpg
答案:
1、1(a+1)/(a^2-1)&-1/a^2-1
2、2b^2/6ab&3a^2/6ab
3、3a/(x-3)^2&x(3-x)/(x-3)^2
4、2a/(a^2-4)&(a+2)/(a^2-4)
======以下答案可供参考======
供参考答案1:
(a-1)/(1-a^2)2/(1-a^2)
2b^2/6ab3a^2/6ab
3a/(x-3)^2 (-x^2+3x)/(x-3)^2
2a/(a^2-4) a+2/(a^2-4)