2 |
7 |
1 |
2 |
-1 | ||
-
|
7 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
1 |
2x0+4 |
1 |
2x0+4 |
a |
2a-1 |
2 |
a |
a |
a |
a |
a |
2a-1 |
2 |
a |
2a-1 |
2 |
1 |
2 |
a |
a |
a |
a |
1 |
2 |
lim |
△x→0 |
f(x0)-f(x0-△x) |
△x |
A.0 | B.2 | C.-2 | D.不存在 |
A.(1,3) | B.(3,3) | C.(6,-12) | D.(2,4) |
lim |
△x→0 |
f(x0-△x)-f(x0) |
△x |
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