-

2014

4

3

www. perikentro.blogspot.gr/ :

1

3- 4 1 2

x+=0 x+=0 x=-

0 ,

x

=0 0 =0 =0 . ,

1 x=,

10 ( x=)

10 x+

x+=0.

: |f(x)|= 0

: x= ()

0

2

x 2,1

=0

2x

0, 0 2. =0, 0 6. 0S,0,0 3.

www. perikentro.blogspot.gr/ :

2

1 2

x+>0 x>- (1)

>0

x - (2) 0 (2) (1) >0 (2) (1) x IR x < - , x - , x -

x2+x+ 2 x2+x+=0 x2+x+=0

:

|f(x)|0 )x(f|)x(f| |f(x)|> (2) 0 )x(f)x(f|)x(f| =0 (1) f(x) 0 |f(x)|0 x1,x2 f(x)=(x-x1)(x-x2)

=0

2

2x)x(f

0 x . x .

x - 1 2 + >0

x - +

=0

x - + 0 x2+x+0 (0 (0(