问题 解答题 (1)计算:|-3|+4+(1-2)0-tan45°;(2)解不等式组:-3(x+1)-(x-3)<82x+13-1-x2≤1. 答案 (1)原式=3+2+1-1=5;(2)整理不等式组得-4x<87x≤7解之得,x>-2,x≤1∴-2<x≤1.