8/2/2019 alg. a

1/3

(....)

2012 _3.1()

: 1 3

: :

: 1 2012

A.1. ,

: P(A) P(B). 10

.2. .

5

.3. ,

.

. , :

= . , IR : ( )

2= ( )

2.

. ,

.

. x

= , < 0 ,

| |

. x

2

+x + > 0 >0

8/2/2019 alg. a

2/3

(....)

2012 _3.1()

: 2 3

.2. x f(x) = 3.

9

.3. IR : ( )18 3x f 2012 8

.1. 2x 1 | | x+ = , IR

1. IR , x .

8

2. IR :x 1= , ,

, 3 2.

7

2. 1: y = (

2 4) x + + 1, IR

2: y = (2

+ 4 3) x +2, IR

IR , 1,2

xx, . 10

(), * , = 2 : 7 = 11 f(x) = 1x

2+ 4x + 1, 1 4,

.

.1. 1 4. 8

8/2/2019 alg. a

3/3

(....)

2012 _3.1()

: 3 3

.2. 1 = 1 4 = 5 x1, x2 f(x) = 0, :

) 2 21 2 2 1

x x x x = +

4

) 1 2

2 1

x xB

x x= +

4

) 31 2 1 2

400 (x x ) 2012 x x 12 = + +

4

.3. : 2| x B 2 | | x A | + = , , ,

.2. 5

.