（1）（1/（x-10））+（1/（x-6））=（1/(X-7))+(1/(x-9))
问题描述：
（1）（1/（x-10））+（1/（x-6））=（1/(X-7))+(1/(x-9))
（2）（（x+1）/（x-2））-((x+2)/(X+3))=(1/(x+7))-(1/(x-6))
答
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)y'={(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)}(x-10)+{(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)}(x-10)'y'(10)={(x-1)(x-2)(x-3)(x-4)(x-5)(x-...