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Jyj http://www.liveinternet.ru/users/jyj/post138764691/ |
– , , , , , .. \ \ . ( ) . , :
, , - .
, 70 , , - , , . , ? « » - .
, , . , , , , . \ . «» «», .. . 5 .
, , . , 5. , .. . :
N = 5*a
N a – .
, , N = 15.
, , , . 15 . . , , , . 1 2 - 4 . , , . 15 3 5. , :
15 = 3*5
, , 3 5 5 3, , .. :
3*5=5*3
, .
15 5 , 3. 15 3 , 5. :
1. 15 5 3 15
2. 15 3 5 15
, , . , , , , , .. 3*5 5*3.
1 , 3 5 . : , ? . , 3, a(1), :
3 = 5*a(1)
(1) , 3. , .
:
! , !.
:
(1) = 5*(2)
(2 )= 5*(3)
:
(n) = 5*a(n+1)
a(n+1) = 5*a(n+2)
a(n+1) , , :
3=5^n*a(n)
3, N/5. , .
N/5 = 5^n*a(n) N = 5^(n+1)*a(n).
n+1 – , r (n + 1 = r n = r - 1). , 15 . a(r-1) :
a(r-1) = N/5^r.
r = {1, 2, 3} :
a(0) = 3, a(1) = 15/25 = 3/5, a(2) = 15/125 = 3/25
, :
3/25 -> 3/5 -> 3 -> 15
.. , 5.
, «» 1. ! , , . , () . , , a(n-1) = 1. .. , , . ! r. :
1 = N/5^r, r = ln(N)/ln(5) =1.682606195 , ln – .
? r , . ? , - . , r – .
2, r :
1 = 15/3^r, r = ln(15)/ln(3) = 2.46497352…
, N = k*Y, k - , « » :
r = ln(N)/ln(k)
(3, 5, 7, 11 ..) n = 0, .. - , 1.
231, 3, 7, 11.
, , 6 :
k1 = 3
Y1 = 77 –
k2 = 7
Y2 = 33 –
k3 = 11
Y3 = 21 –
k4 = 3*7 = 21, Y4 = 11
k5 = 3*11 = 33, Y5 = 7
k6 = 7*11 = 77, Y6 = 3
« » :
r1 = ln(231)/ln(3) = 4.953902087
r2 = ln(231)/ln(7) = 2.79684944
r3 = ln(231)/ln(11) = 2.269664473
r4 = ln(231)/ln(21) = 1.787609657
r5 = ln(231)/ln(33) = 1.556529656
r6 = ln(231)/ln(77) = 1.25291471
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1 -
2 - -
...
4 -
5 - – !
6 -
: | (Jyj) |