First, multiple choice questions

The title is 1 23455 6789 10.

Answer A D B C D A A C B B

Second, fill in the blanks

1 1. 12.f(x)= x( 1-x) 13。 14. 15.

Three. solve problems

The minimum positive period ................................ of 16.( 1) f (x) t = 1 min.

From the meaning of the title, 2k-2x+ 2k+, k Z, that is, k-x k+, k Z,

The monotonic increasing interval of f(x) is

(2) Sketch .................................. 10.

19. ....................................... scored 2 points for the solution.

5 points: 5 points

The included angle between vectors is obtuse,

Seven points

Setting =

Solution ......................... 8 points.

When the angle between vectors is 1800. …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

The range of real numbers is 10 points.

20. Solution: According to the inductive formula: ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

( 1)

The score is 5 points.

(2)

Seven points ... Seven points.

Namely:

................... 10 point