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