12.07.2007 .
x + x −1 = 7
:
1:
J ABC
2:
=5,
CL =
=4
10 . 3
.
4
:
3:
x+
1 2
− 5.2 x = 3 .
D (AB || CD, AB>CD), .
4:
, 20
:
5:
log x
-
6:
f ( x ) = sin 3 x + 10.sin x .
4x − 6 < 1. x −1
15.
-
D
7:
=7, CD=1 D
BD. -
,
.
f ( x) = 2 x 2 − 2 x + 3
8: 0
1
.
. DM
9:
ABCD
.
,
5 10: |f(-1)|≤1
|f(1)|≤1 ,
.
.
f ( x) = ax 2 + bx + c , ,
-
.