(5’)(1)计算:(5’)(2)解不等式组.
(2011浙江丽水,17,6分)计算:|-1|--(5-π)0+4cos45°.
(2011福建泉州,18,9分)计算:.
计算:
(2011湖南邵阳,17,8分)计算:。
计算:.