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x1x2+y1y2 | ||||
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A.p为假 | B.¬q为真 | C.p∧q为假 | D.p∨q为真 |
z | 21 |
z | 22 |
A.0 | B.1 | C.2 | D.3 |
A.函数f(x)=
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B.函数f(x)=|log2(x-1)|是(1,+∞)上的1级类增函数 | ||||
C.若函数f(x)=sinx+ax为[
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D.若函数f(x)=x2-3x为[1,+∞)上的t级类增函数,则实数t的取值范围为[1,+∞) |
1 |
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