, , , .
.
, . . , .
1. :
= (1/10)l = ( 1570 = 157 ;
: l = 1570 .
= 160.
:
= 7 + 0,003 = 7 + 0,003 11,8 .
= 12 .
2. , , . . , . 7.20 (1):
= k = 1,15 = 139 ;
: k =1,15 , 4 k = 1,21,15;
= 17538,5 - .
3. ( ). . 7.22 (1):
= = = 136 .
: = 26 / - 275;
l = 1570 ;
f/l = 1/400 - ( );
= 2,06 / - ;
= 121,8 / ;
= 148 / .
4. .
5. , , , . . , 2000 2200 . 100.
= 1200 = 1390 .