π |
2 |
π |
2 |
A.x1+x2>0 | B.x12>x22 | C.x1>x2 | D.x12<x22 |
π |
2 |
π |
2 |
a |
ex |
A.a∈[0,1] | B.a∈(-1,0] |
C.a∈[-1,1] | D.a∈(-∞,-1]∪[1,+∞) |
f2(1)+f(2) |
f(1) |
f2(2)+f(4) |
f(3) |
f2(3)+f(6) |
f(5) |
f2(4)+f(8) |
f(7) |
f2(5)+f(10) |
f(9) |
1 |
2 |
x+2 |
A.(2,+∞) | B.(-∞,-1) | C.[-2,-1)∪(2,+∞) | D.(-1,2) |
A.0 | B.-4 | C.-8 | D.-16 |
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