b2 |
4 |
b2 |
4 |
|b| |
2 |
f(c)-f(b) |
c2-b2 |
c2-b2+bc-b2 |
c2-b2 |
c+2b |
b+c |
b |
c |
c+2b |
b+c |
1 |
1+t |
1 |
1+t |
3 |
2 |
3 |
2 |
b2 |
4 |
3 |
2 |
3 |
2 |
3 |
2 |
A.(-∞,2
| B.(-∞,2
| C.(0,2
| D.(2
|
1 |
2 |
x1+x2 |
2 |
1 |
x |
A.f(x)在x=x0处存在极限,则f(x)在x=x0连续 |
B.f(x)在x=x0处无定义,则f(x)在x=x0无极限 |
C.f(x)在x=x0处连续,则f(x)在x=x0存在极限 |
D.f(x)在x=x0处连续,则f(x)在x=x0可导 |
ax+b |
x2+1 |
© 2017-2019 超级试练试题库,All Rights Reserved.