计算下列各式的值 (1)(2
(2)3 2+log32+lg52+
|
(1)(2
) 1 4
-(-9.6)0-(31 2
) -3 8
+(1.5)-2=(2 3
)9 4
-1-(1 2
)-27 8
+(2 3
)-2=3 2
-1-(3 2
)3×(-3 2
)+2 3
=4 9
-1-3 2
+4 9
=4 9
.1 2
(2))3 2+log32+lg52+
lg8+lg5•lg20+lg22=32⋅3log32+2lg5+2lg2+lg5(lg5+lg4)+lg222 3
=18+2+lg25+2lg2lg5+lg22=20+(lg2+lg5)2=20+1=21.