1+1nx |
x |
1 |
3 |
k |
x+1 |
2 |
n+1 |
k |
x+1 |
(x+1)(1+lnx) |
x |
(x+1)(1+lnx) |
x |
2 |
k(k+1) |
| ||
x2 |
lnx |
x2 |
1 |
3 |
2 |
3 |
2 |
3 |
k |
x+1 |
1+lnx |
x |
k |
x+1 |
(x+1)(1+lnx) |
x |
(x+1)(1+lnx) |
x |
[(x+1)(1+lnx)]′•x-(x+1)(1+lnx) |
x2 |
x-lnx |
x2 |
1 |
x |
h(x) |
x2 |
2 |
x+1 |
1+lnx |
x |
2 |
x+1 |
2 |
x+1 |
2 |
x |
2 |
k(k+1) |
2 |
1×2 |
2 |
2×3 |
2 |
(n-1)n |
2 |
n(n+1) |
1 |
1×2 |
1 |
2×3 |
1 |
n(n+1) |
2 |
n+1 |
2 |
n+1 |
2 |
n+1 |
2 |
n+1 |
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