问题
解答题
化简求值: (1)(2
(2)(lg2)2+lg2lg5+
|
答案
(1)(2
)0.5+0.1-2-π0+7 9 1 3
=(
)25 9
+100-1+1 2 1 3
=
+100-1+5 3
=101; 1 3
(2)(lg2)2+lg2lg5+(lg2)2-lg4+1
=lg2(lg2+lg5)+(lg2-1)2
=lg2+(1-lg2)=1.