x+5 |
(x-1)2 |
1 |
2 |
x+5 |
(x-1)2 |
x+5 |
(x-1)2 |
2(x-1)2 |
(x-1)2 |
(2x+1)(x-3) |
(x-1)2 |
1 |
2 |
A.∀x∈N,x3>x2 |
B.∃x0∈R,x02+2x0+2≤0 |
C.“x>3”是“x2>9”的必要条件 |
D.函数f(x)=ax2+bx+c为偶函数的充要条件是b=0 |
π |
2 |
27 |
4 |
A.1 | B.2 | C.3 | D.4 |
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1 |
2 |
A.p1,p3 | B.p1,p4 | C.p2,p3 | D.p2,p4 |
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