Lz can download it yourself ~ some things can't pass the exam.

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1. Multiple choice questions:1234 5678 9112.

Fill in the blank: (13) (14)10 (15) (16) ②.

Third, answer the question.

17. Solution (1):

You can get it.

,( )

The monotone increasing interval of ∴ is ().

(2)∵ ∴

When, when

The maximum value of is 1+ 1 = 2+

Order 2+= 4 ∴ = 2.

18. Solution: from, from

∴

∴

and

By the known: ⅷ

(1) When > 1

, according to the domain,

∴, which contradicts > 1

(2) When 0 < < 1

Have to

∴ or∴

To sum up, get

19. Proof:

∫x > 0，y>0

∴ (If and only if X = Y, the equal sign holds)

(The equal sign is true if and only if x =)

(The equal sign holds if and only if y =)

∴

that is

The equal sign holds if and only if x = y =.

20. solution: let a and B.

Then a+b, a+b

The line of point A, point P and point E * * *, the line of point D, point P and point C * * *

There is a sum of real numbers, so A+B

a+ b

Ni +a+b

Starting from the basic theorem of plane vector

solve

∴ (㎝2)

(㎝2)

Therefore (2)

2 1. solution (1):∫A-MB =

a+b=(2，0)

∴ If A-MB and A+B * * * lines, there are still

∴ .

(2) ∵ The included angle between A and C is obtuse.

∴ac