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1. , , R1 = 1 , R 2 = 2 R 3 = 4 .

AB 1 2 3 1 2 4 7 R R R R= + + = + + =

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1 1 1 1 1 31 2 2 R R R

= + = + =

AB

2,!!7

3 R = =

"1 2

AB 1 2 1 2

1 1 1 R R

R R R R R

+= + =

1 2AB

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1 2 3 R R

R R R

= = = = + +

AB 1 2 3

1 1 1 1 1 1 1 4 2 1 7

1 2 4 4 4 R R R R

+ += + + = + + = =

AB

4,#7

7 R = =

2 323

2 3

2 41,333

2 4 R R

R R R

= = = + +AB 1 23 1 1,333 2,333 R R R= + = + =

AB 1 1 1 R R R= + = =

111 1 1 1 1

1 1 1 1 3 R R R R R

= + + =

1111

1,333

3 3

R R = = =

AB 1 111 1 ,333 1,333 R R R= + = + =

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2. & ' E ( 12,# ) *+ R =0,05 , l ( 3 m, ( ! -- 2 / ! ( , 17# -- 20-, * R = 10 " # $ % & *.

"

, 7#l l

R

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1, 223A E

& R

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; ' ( ) 1 * ) 2, '; < ) .

' $* + '; 8 < + .

= " +( 2 #,3l R R R R+ + =

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#,3 E

& R

= = = .

;= & '" 1 )( 23,77 )) E R & = , * 2 ( 22, !#)) R & = .6 , '; >= 8 ;"

1 2( 1,12 )) ) ) = .= ?8 * 2 @( 1 2, ! + R & = , ' 8 ( #, 7 + ) & = .

". ' E 1 ( 4 ),

E 2 ( 24 ) E 3 ( 3! ), *

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' % & * ' *

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* 8 * G 1# .

;= ', . E 2 .

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1 2 3 4 24 3! 1 )/ E E E E = + + = + + =+ 1 2 3 , 7 R R R R= + + =

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+ @

114,27A

, 7 7,#/ E &

R R= = =+ +

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1#7,# 14, 27 G 14,13J K

!R & = = + =

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!R & = = + =

#. 9 " E ( 24 ), R1 = 4 , R 2 = 4 ,

R3 = 3 " # $ & 1, & 2, & 3. H ' 8 * R2 ( 3 K.

5 R2 R3 "2 3

232 3

2,4% R R

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3,7#A E E

& R R R

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& R2 R3 " 23 1 23( G)) & R = " 23 2 2 3 3() & R & R=

6 "23

22

2,2#A)

& R

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1,#A)

& R

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:; ' * D HI/ > & = = , .." 1 2 3 & & & = .

;" 3,7# 2, 2# 1,# = , * . R2 ( 3K 8 * ' "

22 2 2( ! , 7# KR & =

$. 9 " E ( 24 ), R1 = 5 , R 2 = 4 ,

R3 = 4 , R 4 = " # $ '.

& ' ; ' ' ..

5 R2 R3 "2 3

232 3

2% R R

R R

= = + " + 1 23 4( 12 R R R R+ + =

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D HI/ '" 1 2 3 1 2 3 & & & & & & = = +M 8 R2 R3 , > =. :, * R2 ( R3, & 2 ( & 3 ( & 1 0 2 ( ,#

%. : E , ; F AB ( 12 ).

5 $

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H "

6 " AB

34

3

E E E &

R R R R R= = =+ +

& 8 ;" AB AB3

3 4 4 R E E

) R & R

= = = ,

" AB4 4 12 4 ) E ) = = =

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6 " E

& R R

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& "

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9 ' "

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2

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) R & R R

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