2a |
5 |
12 |
5 |
12 |
5 |
2a |
5 |
2a |
5 |
12 |
5 |
lg3 |
lg2 |
1-lg2 |
lg2 |
lg3-1 |
lg2 |
A.b=logaN | B.b=-log
| C.a=N-b | D.a=N
|
f(x)+f(y) |
0-f(x)f(y) |
A.f(x)=3x | B.f(x)=sinx | C.f(x)=log2x | D.f(x)=tanx |
2 |
x |
1 |
y |
A.2 | B.3 | C.4 | D.6 |
A.log2a=b | B.log2b=a | C.logba=2 | D.logab=2 |
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