– 2 – – 3 – 2.
A xy B 2x y+ +1 C x y+ D 2xy+2
(x ) (x ) 5 -12 =3 +5 5+
(x ) (x ) 5 -12 =3 +5 5+
(x ) x 5 -12 =3 20+
x x
5 60 3 20- = + 2x=40
x=20
– 2 – – 3 – 4.
3.
A 15 100$70 B 70 10015$ C 15 100$70 D 15 70100$
– 5 – 6.
A -5 B 2,5 C 3,5
( )
f x = 23x m+
f 3b l2 =0 m
A - B 0
D 2
– 5 –
8. x
A 28°
B 32°
C 38°
– 6 – – 7 – A x= 14 4 23 + y- z
B x=-14 4 23 - y+ z C x= 1 14 4 23( + y- z) D x=-1 14 4 23( - y+ z)
x y yx
21 31
+ = xy
D 30
– 6 – – 7 – 12.
11. f x( )=3 1x+ ( )
g x =2 3x- ( ) ( ) ( ) h x =f x g x-
Vilket h y h x= ( )
A
B
C
D
2 34$ 4
A 6 B 68 C 6
D 6