(1)(0.027)^-1/3-(-1/7)^-2+(2又7/9)^1/2-(√2-1)^0
=[(0.3)³]^(-1/3)-1/(-1/7)²+√(25/9)-1
=0.3^(-1)-49+5/3-1
=1/0.3-49+5/3-1
=10/3+5/3-50
=5-50
=-45
注意(-1/7)^-2=1/(-1/7)²=1/(1/49)=49
(2)(1/4)^-1/2×(√4ab^-1)^3/0.1^-2(a^3b^-3)^1/2
=[2^(-2)]^(-1/2)×2³a^(3/2)b^(-3/2)/[10^(-1)](-2)a^(3/2)b^(-3/2)
=2×2³a^(3/2-3/2)b^(-3/2+3/2)/10²
=(16/100)a^0b^0
=4/25
注意√b^(-1)=b^(-1/2)
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