1 |
3 |
A.f′(a)=g′(a) | B.f′(a)<g′(a) | C.f′(a)>g′(a) | D.不能确定 |
1 |
3 |
A.3x-y+1=0 | B.3x-y-1=0 | C.3x+y-1=0 | D.3x-y-5=0 |
A.1 | B.-1 | C.±1 | D.3
|
A.cos2x-cosx | B.cos2x+cosx | C.cos2x+sinx | D.cos2x+cosx |
A.1 | B.2 | C.3 | D.4 |
A.3△t+6 | B.-3△t+6 | C.3△t-6 | D.-3△t-6 |
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