4x+k•2x+1 |
4x+2x+1 |
t2+kt+1 |
t2+t+1 |
1 |
t |
1 |
t |
1 |
t |
1 |
t |
1 |
t |
4x+2x+1+(k-1)2x |
4x+2x+1 |
k-1 | ||
2x+
|
1 |
2x |
k-1 |
t |
k+2 |
3 |
k+2 |
3 |
k+2 |
3 |
2k+4 |
3 |
k+2 |
3 |
k+2 |
3 |
2k+4 |
3 |
k+2 |
3 |
2k+4 |
3 |
1 |
2 |
1 |
2 |
lnx |
x |
A.(0,
| B.(-∞,
| C.(0,e) | D.(e,+∞) |
3 |
4 |
x2 |
a2 |
y2 |
(10-a)2 |
ln(x+1) |
x+1 |
x | ||
(x+1)
|
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