计算下列各式的值(急!)
问题描述:
计算下列各式的值(急!)
(1):81^(3/4)×3^(-3)+0.25^(-1/2)×0.0012^0
(2):32^(-2/5)+(√2/2)^(-4)×4^(-1/2)-0.2^-1
答
(1):81^(3/4) ×3^(-3)+0.25^(-1/2)×0.0012^0
=3³×3^(-3)+2
=1+2
=3
(2):32^(-2/5)+(√2/2)^(-4)×4^(-1/2)-0.2^-1
=1/4+4×1/2-5
=1/4+2-5
=-2.75