收起1.化简:4/(x^2-16)除以2/（x-4）+x/（x+4）=4/(x+4)(x-4)×(x-4)/2+x/(x+4)=2/(x+4)+x/(x+4)=(x+2)/(x+4)迷心咒H2.计算{a+2/(a^2-2a)+8/(4-a^2)}除以a-2/a=a²/(a-2)+2/(a-2)²-8a/(a+2)(a-2)²=(a&...