2020屆青浦二模(教師版)

5r555r552,0年上海市青浦區(qū)高三二模試卷分析1-647-12A(

U

A

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f

x

fxxf

32

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2

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216

πcm

cm3

r

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2

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1yx=yxxxy

2xyx

11y

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a

b

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f(xx

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a

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f(x

x

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xxx

a

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k

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kk

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b

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a

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………………A

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f2(x)af(

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A

ACAACAB

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18.

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x

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12

]()

2m

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x

8

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mf

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m

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t

t

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t

0

1200

560

pt

1

pt

6

2

p(t)t

360

21201200,10

tk∵64k560

∴

∴

t1200,10

2

20021200,1020

∴

9

360,2360,10360,2360,106

0402

Q

6t

360

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①

Q84060t

t

120t②1020

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m

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)

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1

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F(

F(3,0)

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yy30

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2

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11

0200*0200*3|

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3

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32

0

2

33

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m

x

m

20

y

2

x

M(,y)0

M

xAB1M2

M

2Q

A

B

3t

yyAB

t21.

nn

max,,kk

N

n

,12

a12k

a,aakn

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n1ann

2b

3

n

nnabn22

12

an3n232annmaxa,a,1n

n

n(03n22a,,2

a

maxa,,,a2

a

,

a,,

,a2

a,,a1

n

ba，,b,b“”

b,,bn1nn

3

n

nnab22

naa1

n2n

baa2123aab3aa232

*aaba*33232aa*aa1232aaa31

aa*a333

13

1nk1nk

n

nnabn22

a

an，a,

nN

*

………………14

nan1

n2

a

nnaaa2222

a.……………………163.a

a,na,

,a1

a,an

,aa

a

k

ak