A.函数y=2sin2x的图象向右平移
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B.函数f(x)=xcos2x在区间[0,2π]上的零点个数为5 | ||||
C.函数y=log
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D.命题“若α=
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π |
6 |
π |
6 |
π |
3 |
π |
4 |
3π |
4 |
5π |
4 |
7π |
4 |
π |
4 |
π |
4 |
A.“x<0”是“x2-3x+2>0”的充分不必要条件 |
B.若命题p:∃x∈R,使得x2+x+1<0,则¬p为:∀x∈R,均有x2+x+1≥0 |
C.若p∧q为假命题,则p,q均为假命题 |
D.命题“若x2-3x+2=0,则x=2”的逆否命题为“若x≠2,则x2-3x+2≠0” |
A.①和③ | B.②和③ | C.③和④ | D.①和② |
π |
4 |
5 |
2 |
A.4 | B.3 | C.2 | D.1 |
u |
v |
u |
v |
π |
2 |
π |
2 |
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