问题
解答题
计算: (1)(
(2)(lg5)2+lg2•lg5+lg2. |
答案
(1))(
)-1+161 2
+(3 4
)0=2+1
-13
+1=2+8+1=11;4 163
(2))(lg5)2+lg2•lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg10=1;
计算: (1)(
(2)(lg5)2+lg2•lg5+lg2. |
(1))(
)-1+161 2
+(3 4
)0=2+1
-13
+1=2+8+1=11;4 163
(2))(lg5)2+lg2•lg5+lg2=lg5(lg5+lg2)+lg2=lg5+lg2=lg10=1;