2019-2020
1 1
C2 2
x y a l 2
C2 2 2 2 3 0x y x ay l
A2 4 5 0x y B2 4 5 0x y C2 4 5 0x y D2 4 5 0x y
2 28 4 0x x 1 2
,x x 2 1 2 2
log logx x
A.1 B.2 C.3 D.4
3 f(x)=2sinxcosx ( )
Af(x) 42 Bf(x)
Cf(x) 2Df(x) 2
4 P02 x+my40 Q Q x+2y140
A0 B2 C5D25
5 1
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x
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6 xR |x 2|<1 2x2>0 ( )
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7 1
2
5a log b=log 8275
1
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8
x3
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6 3 ( )
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y sin 2 6 B
y cos 2x 3C
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y sin 2x 6
9 1
( ) sin 2 6 2
f x x ,f ( )x ,
3m 3
2,m
A2B3C6D12
10 ABCD ABC 2
2
logy x 1
2
y x 2
2
x
y
A 2 D
