陕西省宝鸡中学2020届高三上学期第一次模拟考试数学(理)试题 PDF版含答案

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f (x) ( 2, 1 2) b
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b0
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源自文库
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42
8
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cos cos ACB sin sin ACB 3 4 3 4 3 3
3
3
10 10 10
BD 8 3 5
AEF
2
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12+(2 2)2 32
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CD PA, BC CD C
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n (x, y, z)
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f (x) x ln x 2x, (x 0)
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S 225
9
22 400 S 4
f (x)
R
f (x 1) f (x 1)
f (x)
pX 0 pX 2
108 81 189
36
P(A1) P(A2) 256 256 256 p X 1 P(A3) 256
C42
12 4
32 4
1 3
18 256
pX 3
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1 4
1 4
C32
12 4
3 4
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189
36
18
13
256
256
256
256
E X 1 36 2 18 3 13 111 256 256 256 256
F(x) (x 2)(ex 1) ln(x 2) x 2
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x2
x2
x2
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ex
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0
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f (4) f (0) 0 f ( 9) f ( 1)
4
4
f ( x) f (x)
f (0) 0
1
1
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log2(4) 2
f ( 9) f (4) 2 4
83
43 3
5
10
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BD
BC
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sin ACB
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x
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10
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108 256
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(
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81 256
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(
3 4
)
2
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