1 |
2 |
1 |
2x-1 |
(1+2x)2 |
x•2x |
A.(1)(3) | B.(1)(4) | C.(2)(3) | D.(2)(4) |
1 |
2 |
1 |
2x-1 |
2x+1 |
2(2x-1) |
2-x+1 |
2(2-x-1) |
1+2x |
2(1-2x) |
(1+2x)2 |
x•2x |
(2-x+1)2 |
(-x)•2-x |
(2x+1 )2 |
(-x)•2x |
kπ |
2 |
i |
j |
a |
i |
j |
b |
i |
j |
a |
b |
1 |
2 |
̂ |
y |
A.存在x∈R,sin2
| ||||||
B.任意x∈(0,π),sinx>cosx | ||||||
C.任意x∈(0,+∞),ex>1+x | ||||||
D.存在x∈R,x2+x=-1 |
A.① | B.①② | C.①③ | D.②③ |
π |
4 |
π |
4 |
m |
n |
7π |
4 |
3π |
4 |
m |
2 |
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