lg5•lg8000+(lg2
| ||||
lg600-
|
lg5⋅(lg8+3)+(
| ||||||||
lg6+2-
|
lg5⋅(3lg2+3)+3(lg2)2 | ||||
lg6+2-
|
3lg5⋅lg2+3lg5+3(lg2)2 |
4 |
3lg2(lg5+lg2)+3lg5 |
4 |
3lg2+3lg5 |
4 |
3 |
4 |
3 |
4 |
A.f(x)在(-∞,0)上是增函数 | B.f(x)在(-∞,0)上是减函数 |
C.f(x)在(-∞,-1)上是增函数 | D.f(x)在(-∞,-0)上是减函数 |
1 |
25 |
1 |
8 |
1 |
9 |
1 |
2 |
1 |
2 |
1 |
2 |
2 |
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