1 |
1+a |
1 |
1+b |
a |
1+a |
b |
1+b |
A.M>N | B.M<N |
C.M=N | D.M、N的大小不能确定 |
1 |
1+a |
1 |
1+b |
1+b+1+a |
(1+a)(1+b) |
2+b+a |
(1+a)(1+b) |
a(1+b)+b(1+a) |
(1+a)(1+b) |
a+2ab+b |
(1+a)(1+b) |
2+b+a |
(1+a)(1+b) |
a+2ab+b |
(1+a)(1+b) |
2+a+b-a-2ab-b |
(1+a)(1+b) |
2-2ab |
(1+a)(1+b) |
2 | ||
|
x-y | ||||
|
2xy | ||||
x
|
A.
| B.
| ||||||||||||
C.
| D.
|
1 |
1×2 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
1 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
3×4 |
1 |
2009×2010 |
1 |
1×2 |
1 |
1 |
1 |
2 |
1 |
2×3 |
1 |
2 |
1 |
3 |
1 |
3×4 |
1 |
3 |
1 |
4 |
2 |
1×2 |
2 |
2×3 |
2 |
3×4 |
2 |
n×(n+1) |
2 |
x+3 |
2 |
3-x |
2x+18 |
x2-9 |
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