问题 填空题 计算:(1)6a8y•2y23a2=______;(2)x+1y÷x2-1y2=______. 答案 (1)原式=y2a;(2)原式=x+1y•y2(x+1)(x-1)=yx-1.故答案为:(1)y2a;(2)yx-1