() (w) | (f) | () | (fa) | |
-4 | -12 | |||
-3 | -18 | |||
-2 | -20 | --65 | ||
-1 | -15 | |||
-21 | ||||
+1 | +19 | |||
+2 | +28 | +78 | ||
+3 | +18 | |||
+4 | +8 | |||
+5 | +5 |
. , 21. ( = 21) . 19 , 17 , 15 , 13 4 . , , . 23, 25,27 . . 1,2, 3 . . , , . , a f fa . , fa , (+fa), , , . , (+fa) +78, 65. (+ 78)+ (65) = 13.
∑fa , . X (4) b:
+, , , .
- ,
: = A+b = 21+0,26 = 21,26
.
(). . :
(5)
; 1,2 3...,Xn , . . ; , nz,...,ns () .
. . Xi = 420, n1 = 1000, X2 = 460, n 2 = 500, 3=520, n 3=2000. .
(1, 2, X3), (1, 2, n 3), . - (1 =420) , (2 = 460), 1 1000 , 2 500 . (3 =500), 2000 , (2=460), 500 . (5), :
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