A.3△t+6 | B.-3△t+6 | C.3△t-6 | D.-3△t-6 |
. |
V |
[5-3(1+△t)2]-[5-3×12] |
△t |
π |
4 |
A.3 | B.2 | C.1 | D.0 |
A.
| B.
| C.
| D.
|
A.ex.sinx | B.ex(sinx-cosx) |
C.-ex.sinx | D.ex(cosx-sinx) |
A.(-2,-8) | B.(-1,-1) | C.(-2,-8)或(2,8) | D.(-1,-1)或(1,1) |
A.(logax)′=
| B.(logax)′=
| ||||
C.(5x)"=5x | D.(5x)"=5xln5 |
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