1 |
2 |
f(x1)+f(x2) |
2 |
x1+x2 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2(x-1) |
1 |
2 |
2-x |
2(x-1) |
m |
x-1 |
(m-1)x+1 |
x-1 |
1 |
1-m |
1 |
1-m |
1 |
1-m |
1 |
1-m |
f(x1)+f(x2) |
2 |
x1+x2 |
2 |
mln(x1-1)+mln(x2-1) |
2 |
x1+x2 |
2 |
x1+x2 |
2 |
(x1-1)+(x2-1) |
2 |
(x1-1)(x2-1) |
x1+x2 |
2 |
(x1-1)(x2-1) |
1 |
2 |
1 |
2 |
1 |
3 |
1 |
2 |
A.ex≤1+x+x2 | B.
| ||||||||
C.cosx≥1-
| D.ln(1+x)≥x-
|
y |
x |
1-lny |
1-lnx |
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