1 |
m |
1 |
n |
1 |
30-4n |
1 |
n |
3(10-n) |
n(30-4n) |
1 |
y |
n(30-4n) |
3(10-n) |
40n-4n2-10n |
3(10-n) |
4n(10-n)-10n |
3(10-n) |
4n |
3 |
10n |
3(10-n) |
4n |
3 |
10(10-n)-100 |
3(10-n) |
4n |
3 |
100 |
3(10-n) |
10 |
3 |
-4(10-n)+40 |
3 |
100 |
3 (10-n) |
10 |
3 |
4 |
3 |
25 |
10-n |
50 |
3 |
4 |
3 |
25 |
50 |
3 |
10 |
3 |
25 |
10-n |
1 |
y |
A.无最大值也无最小值 | B.有最大值无最小值 |
C.无最大值有最小值 | D.有最大值也有最小值 |
x2+a+1 | ||
|
1 |
x |
1 |
y |
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