:
- ;
- , ;
- , .
.
1 2 3.
2.
120 . : QD =180 3R, R ., QD . 10%. . 10 .. . ?
.
QS = 120 , QD =180 3R. : QS = QD.
120=180 3R, 60=3R, R=20 .- .
= - .
, QD =180 3*10=150 () 120 .
120*20=2400 . 120*10=1200 ..
3.
250 . .. 10% 5%. , 15%, 10% ( )?
.
( ) : r = i Ti, r , i , Ti .
: r0 = 10 5=5%, r1 = 15 10=5%, 5%, .