, , , !
2 :
– 72
– 60 ( – 100)
. , .
. . ( ).
: R1= 1/2 a 4 = 72/2-10=36-4=32.
: R2= +R1=60+32=92
(. . 1. ). , 4, .
1,5, – 2.
, . , , , . , , , .
– 1, – 2 . .
! , , - . .