a2 |
b |
b2 |
a |
A.P>Q | B.P≥Q | C.P<Q | D.P≤Q |
a2 |
b |
b2 |
a |
(a2-b2)(a-b) |
ab |
(a-b)2(a+b) |
ab |
ab |
cd |
ma+nc |
|
A.P≥Q | B.P≤Q | C.P>Q | D.P<Q |
1 |
a |
1 |
b |
A.1个 | B.2个 | C.3个 | D.4个 |
A.b-a>0 | B.a3+b3<0 | C.a2-b2<0 | D.b+a>0 |
x1 |
1+a |
ax2 |
1+a |
ax1 |
1+a |
x2 |
1+a |
A.x1x2>y1y2 | B.x1x2=y1y2 |
C.x1x2<y1y2 | D.不能确定,与a有关 |
π |
4 |
| ||
2 |
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