计算:9-2sin45°-(3.14-pi)^0+1/2√8-2^3
问题描述:
计算:9-2sin45°-(3.14-pi)^0+1/2√8-2^3
答
原式=9-2×1/2-1+1/2×2√2-8
=9-1-1+√2-8
=√2-1