1

= 14 = 13 = 15 ȡ :

                               

: : = (1 + /\5 ): 2 : 2


 

2

:

1 −3 + 9 = 10 −1.5 '

                     

2 3 2 + /\3 = 0 ' [ 0 2 [


1 -1.1 , 0.1 0 , 1 13 3.6

2 0 120 180 300      


3

:

                        

               (1 + /\5 )

18 =           ( + ) ( − ) 36 = 54

                    4


/