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9; 3141592409
10; 31415925457
11; 314159264013
12; 3141592649625
13; 31415926532017
14; 314159265350589
15; 3141592653588533
16; 31415926535867961
17; 314159265358987341
18; 3141592653589764829
19; 31415926535897744669
20; 314159265358978759661
21; 3141592653589792630933
22; 31415926535897931085161
23; 314159265358979322639853
24; 3141592653589793234680617
25; 31415926535897932384615349
26; 314159265358979323823745421
27; 3141592653589793238428435569
28; 31415926535897932384568540625
29; 314159265358979323846212602093
30; 3141592653589793238462579472373
31; 31415926535897932384626459376945
32; 314159265358979323846263865968245
33; 3141592653589793238462643289640533
34; 31415926535897932384626432234171745
35; 314159265358979323846264338399627025
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No.706DD++2023幎3æ19æ¥ 13:26
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æå®ã®åæ°ã®æ Œåç¹ãæã€ïŒå€æ°æ¹çšåŒã§
2*n+2 (nâ§0)ã®å¶æ°ã§ã¯
4*x^2+y^2=5^n
2*n+1 (nâ§0)ã®å¥æ°ã§ã¯
(4*x+1)^2+y^2=25^n
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https://mathworld.wolfram.com/SchinzelCircle.html
n=2*k (k=1,2,3,)ã§ã¯
(x-1/2)^2+y^2=5^(k-1)/4
n=2*k+1 (k=0,1,2,3,)ã§ã¯
(x-1/3)^2+y^2=5^(2*k)/9
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ããã«åŸã£ãŠn; ã§ã®æ Œåç¹ãèšç®ãããš
2;
(0,0)
(1,0)
4;
(0,±1)
(1,±1)
6;
(-2,0)
(-1,±2)
(2,±2)
(3,0)
8;
(-5,±1)
(-2,±5)
(3,±5)
(6,±1)
10;
(-12,0)
(-7,±10)
(-3,±12)
(4,±12)
(8,±10)
(13,0)
12;
(-27,±5)
(-20,±19)
(-12,±25)
(13,±25)
(21,±19)
(28,±5)
14;
(-62,0)
(-58,±22)
(-37,±50)
(-17,±60)
(18,±60)
(38,±50)
(59,±22)
(63,0)
16;
(-137,±25)
(-102,±95)
(-62,±125)
(-14,±139)
(15,±139)
(63,±125)
(103,±95)
(138,±25)
18;
(-312,0)
(-292,±110)
(-263,±168)
(-187,±250)
(-87,±300)
(88,±300)
(188,±250)
(264,±168)
(293,±110)
(313,0)
20;
(-687,±125)
(-599,±359)
(-512,±475)
(-312,±625)
(-72,±695)
(73,±695)
(313,±625)
(513,±475)
(600,±359)
(688,±125)
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1;
(0,0)
3;
(-1,±1)
(2,0)
5;
(-8,0)
(-2,±8)
(7,±5)
7;
(-33,±25)
(12,±40)
(15,±39)
(42,0)
9;
(-208,0)
(-73,±195)
(-58,±200)
(167,±125)
(176,±112)
11;
(-878,±560)
(-833,±625)
(292,±1000)
(367,±975)
(1039,±79)
(1042,0)
13;
(-5208,0)
(-5193,±395)
(-1833,±4875)
(-1458,±5000)
(3918,±3432)
(4167,±3125)
(4392,±2800)
15;
(-21958,±14000)
(-20833,±15625)
(-19588,±17160)
(5375,±25481)
(7292,±25000)
(9167,±24375)
(25967,±1975)
(26042,0)
17;
(-130208,0)
(-129833,±9875)
(-54944,±118048)
(-45833,±121875)
(-36458,±125000)
(-26873,±127405)
(97942,±85800)
(104167,±78125)
(109792,±70000)
19;
(-573921,±307359)
(-548958,±350000)
(-520833,±390625)
(-489708,±429000)
(134367,±637025)
(182292,±625000)
(229167,±609375)
(274722,±590240)
(649167,±49375)
(651042,0)
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No.695ãããã2023幎3æ18æ¥ 09:30
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No.702ããããã¯ã¡ã¹ã2023幎3æ18æ¥ 18:29
ãŠã©ãªã¹ã®ç©ã§ååãå¶æ°ãåæ¯ãå¥æ°ã§ç©ãäœã
(2*2*4*4*6*6*8*8*10*10*12*12*14*14*16*16*18*18*)/(1*1*3*3*5*5*7*7*9*9*11*11*13*13*15*15*17*17*)
=Ï/2
ãšããçåŒããããŸãããã
ããã§ãããã
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ãã£ãŠ
(2*4)/(3*3)*(4*6)/(5*5)*(6*8)/(7*7)*(8*10)/(9*9)*(10*12)/(11*11)*(12*14)/(13*13)*(14*16)/(15*15)*(16*18)/(17*17)*=Ï/4
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Î(3/2)^2 ã«ãã£ãŠã瀺ãããã
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lim[n->oo]Î (k=2,n,(prime(k)-1)*(prime(k)+1)/prime(k)^2â¡
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=(2*4)/(3*3)*(4*6)/(5*5)*(6*8)/(7*7)*(10*12)/(11*11)*(12*14)/(13*13)*(16*18)/(17*17)*
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3/4*{(2*4)/(3*3)*(4*6)/(5*5)*(6*8)/(7*7)*(10*12)/(11*11)*(12*14)/(13*13)*(16*18)/(17*17)*}*ζ(2)=1
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ãååšããŠãä»»æã®æ£ã®èªç¶æ° n ã«ã€ããŠ
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No.646Dengan kesaktian Indukmu2023幎3æ13æ¥ 09:19
Dengan kesaktian Indukmuæ§ããã¯ããããããŸãã
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ãååšããŠãä»»æã®æ£ã®èªç¶æ° n ã«ã€ããŠ
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No.648ããããã¯ã¡ã¹ã2023幎3æ13æ¥ 10:27
dengan ãããããŠããã®ã¯ã
e = Σ[k=0..â] 1/(k!)
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No.649DD++2023幎3æ13æ¥ 11:02
ïŒdengan ãããããŠããã®ã¯ã
e = Σ[k=0..â] 1/(k!)
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ãæ¯èŒããŠÏ^2/6=Σ[k=0..â] 1/(k^2)ãçè«ã¥ããŠããŸãããåãåŒãããx^5,x^7ã®é
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((1-x^2/(1Ï)^2) (1-x^2/(2Ï)^2) (1-x^2/(3Ï)^2) (1-x^2/(4Ï)^2) (1-x^2/(5Ï)^2) (1-x^2/(6Ï)^2) (1-x^2/(7Ï)^2))
=x^14ã®é
ãã»ã»ã»x^8ã®é
ã
x^6ã®é
- x^2/(4Ï)^2 x^2/(6Ï)^2 x^2/(7Ï)^2 - x^2/(5Ï)^2 x^2/(6Ï)^2 x^2/(7Ï)^2
- x^2/(4Ï)^2 x^2/(5Ï)^2 x^2/(7Ï)^2 - x^2/(3Ï)^2 x^2/(5Ï)^2 x^2/(7Ï)^2
- x^2/(3Ï)^2 x^2/(4Ï)^2 x^2/(7Ï)^2 - x^2/(4Ï)^2 x^2/(5Ï)^2 x^2/(6Ï)^2
- x^2/(3Ï)^2 x^2/(6Ï)^2 x^2/(7Ï)^2 - x^2/(2Ï)^2 x^2/(6Ï)^2 x^2/(7Ï)^2
- x^2/(1Ï)^2 x^2/(6Ï)^2 x^2/(7Ï)^2 - x^2/(2Ï)^2 x^2/(5Ï)^2 x^2/(7Ï)^2
- x^2/(1Ï)^2 x^2/(5Ï)^2 x^2/(7Ï)^2 - x^2/(3Ï)^2 x^2/(5Ï)^2 x^2/(6Ï)^2
- x^2/(2Ï)^2 x^2/(4Ï)^2 x^2/(7Ï)^2 - x^2/(1Ï)^2 x^2/(4Ï)^2 x^2/(7Ï)^2
- x^2/(2Ï)^2 x^2/(3Ï)^2 x^2/(7Ï)^2 - x^2/(1Ï)^2 x^2/(3Ï)^2 x^2/(7Ï)^2
- x^2/(1Ï)^2 x^2/(2Ï)^2 x^2/(7Ï)^2 - x^2/(2Ï)^2 x^2/(3Ï)^2 x^2/(6Ï)^2
- x^2/(2Ï)^2 x^2/(5Ï)^2 x^2/(6Ï)^2 - x^2/(1Ï)^2 x^2/(5Ï)^2 x^2/(6Ï)^2
- x^2/(3Ï)^2 x^2/(4Ï)^2 x^2/(6Ï)^2 - x^2/(2Ï)^2 x^2/(4Ï)^2 x^2/(6Ï)^2
- x^2/(1Ï)^2 x^2/(4Ï)^2 x^2/(6Ï)^2 - x^2/(1Ï)^2 x^2/(3Ï)^2 x^2/(6Ï)^2
- x^2/(1Ï)^2 x^2/(2Ï)^2 x^2/(6Ï)^2 - x^2/(3Ï)^2 x^2/(4Ï)^2 x^2/(5Ï)^2
- x^2/(2Ï)^2 x^2/(4Ï)^2 x^2/(5Ï)^2 - x^2/(1Ï)^2 x^2/(4Ï)^2 x^2/(5Ï)^2
- x^2/(2Ï)^2 x^2/(3Ï)^2 x^2/(5Ï)^2 - x^2/(1Ï)^2 x^2/(3Ï)^2 x^2/(5Ï)^2
- x^2/(1Ï)^2 x^2/(2Ï)^2 x^2/(5Ï)^2 - x^2/(2Ï)^2 x^2/(3Ï)^2 x^2/(4Ï)^2
- x^2/(1Ï)^2 x^2/(3Ï)^2 x^2/(4Ï)^2 - x^2/(1Ï)^2 x^2/(2Ï)^2 x^2/(4Ï)^2
- x^2/(1Ï)^2 x^2/(2Ï)^2 x^2/(3Ï)^2
x^4ã®é
+ x^2/(6Ï)^2 x^2/(7Ï)^2 + x^2/(5Ï)^2 x^2/(7Ï)^2 + x^2/(4Ï)^2 x^2/(7Ï)^2
+ x^2/(3Ï)^2 x^2/(7Ï)^2 + x^2/(2Ï)^2 x^2/(7Ï)^2 + x^2/(1Ï)^2 x^2/(7Ï)^2
+ x^2/(5Ï)^2 x^2/(6Ï)^2 + x^2/(4Ï)^2 x^2/(6Ï)^2 + x^2/(3Ï)^2 x^2/(6Ï)^2
+ x^2/(2Ï)^2 x^2/(6Ï)^2 + x^2/(1Ï)^2 x^2/(6Ï)^2 + x^2/(4Ï)^2 x^2/(5Ï)^2
+ x^2/(3Ï)^2 x^2/(5Ï)^2 + x^2/(2Ï)^2 x^2/(5Ï)^2 + x^2/(1Ï)^2 x^2/(5Ï)^2
+ x^2/(3Ï)^2 x^2/(4Ï)^2 + x^2/(2Ï)^2 x^2/(4Ï)^2 + x^2/(1Ï)^2 x^2/(4Ï)^2
+ x^2/(2Ï)^2 x^2/(3Ï)^2 + x^2/(1Ï)^2 x^2/(3Ï)^2 + x^2/(1Ï)^2 x^2/(2Ï)^2
x^2ã®é
- x^2/(7Ï)^2 - x^2/(6Ï)^2 - x^2/(5Ï)^2 - x^2/(4Ï)^2 - x^2/(3Ï)^2 - x^2/(2Ï)^2 - x^2/(1Ï)^2
å®æ°é
+ 1
x^2(å®éã¯x^3)ã®é
ãã
(x^2/Ï^2){1/1^2+1/2^2+1/3^2+1/4^2+1/5^2+1/6^2+1/7^2}=(x^2/Ï^2) Σ1/n^2ã¯ã§ããŸããã
x=4,6(å®éã¯x^5,7)ã®é
ããã§ããŸããããã¡ãªã¿ã«ãx^4ïŒå®éã¯x^5)ã®é
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ããã§ããªã€ã©ãŒã¯ãΣ[k=0..â] 1/(k^4)ããx^5ã®é
ãæ±ããŠããã¯ãã§ãã
No.651ããããã¯ã¡ã¹ã2023幎3æ13æ¥ 11:22
ã¯ã¡ã¹ããããžã
a_n = (1 +1/n)^n
b_n = (1 +1/n)^(n +1)
ãšããããã
No.654Dengan kesaktian Indukmu2023幎3æ13æ¥ 12:59
Dengan kesaktian Indukmuæ§ãããã«ã¡ã¯ã
a_n = (1 +1/n)^n
b_n = (1 +1/n)^(n +1)
ã§ãnââãšãªããšãa_n=eã«ãªããŸããã
a_nã®ã°ã©ãã¯ãhttp://y-daisan.private.coocan.jp/html/20230313_BMP/2023-3-13-010.png
b_nã®ã°ã©ãã¯ãhttp://y-daisan.private.coocan.jp/html/20230313_BMP/2023-3-13-011.png
b_n-a_nã®ã°ã©ãã¯ãhttp://y-daisan.private.coocan.jp/html/20230313_BMP/2023-3-13-012.pngãšhttp://y-daisan.private.coocan.jp/html/20230313_BMP/2023-3-13-013.png
ã§ãã
b_n-a_n=(1+1/n)^(n+1)-(1+1/n)^n={(1+1/n)-1}(1+1/n)^n=(1/n)(1+1/n)^n
ã§ãnââãšãªããšã(1/n)(1+1/n)^n=(1/n)eãšãªã£ãŠãç¡çæ°ã§ããã
(1/n)ãããã£ãŠããã®ã§ãlim(1/n)eâ0ã§ããã
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b_n=(1+1/n)a_nã§ããã
a_n<e<b_n ãã¯ãa_n<e<(1+1/n)a_nã
a_n<e<ã(1+1/n)ãa_n=b_n
b_n-a_nãã¯ã
0<e-a_n<ã(1+1/n)ãa_n-a_n=b_n-a_n
0<e-a_n<ã(1/n)ãa_n
ããŠãnããããŠã
0<n(e-a_n)<ãa_n
ne-n a_n<ãa_n
na_nã足ããŠã
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No.656ããããã¯ã¡ã¹ã2023幎3æ13æ¥ 13:49
> x=4,6(å®éã¯x^5,7)ã®é
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ãšãããããã€ãŠããã®ïŒæ§ïŒæ²ç€ºæ¿ã§å®éã«ãã£ãããšãããã®ã§ããµã€ãã®æ¹ã®èšå€§ãªèšäºã®ã©ããã«æ®ã£ãŠããã¯ãã§ãã
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No.657DD++2023幎3æ13æ¥ 14:05
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No.658ããããã¯ã¡ã¹ã2023幎3æ13æ¥ 15:12
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No.661Dengan kesaktian Indukmu2023幎3æ13æ¥ 23:03
Dengan kesaktian IndukmuããŸããã¯ããããããŸãã
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No.663ããããã¯ã¡ã¹ã2023幎3æ14æ¥ 07:07
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a_n ã b_n ããç¡è«ãc ã«åæããŸãã
ç¡çæ° c ãäžããããã°ãäžã®ãããªãæçæ°å a_n ã b_n ã
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No.685Dengan kesaktian Indukmu2023幎3æ17æ¥ 14:32
ã¯ã¡ã¹ãããã«ãç解é ãããããšãããã²ãšã€ã
å®æ°ãaãbããã ããb > a ã«ã€ããŠä»¥äžããããŸãã
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No.686Dengan kesaktian Indukmu2023幎3æ17æ¥ 15:18
倱瀌ããããŸããã
å®æ°ãaãbããã ããb > a ã«ã€ããŠä»¥äžããããŸãã
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å®æ°ãaãbããã ããb ⧠a ã«ã€ããŠä»¥äžããããŸãã
ã«ããŠãã ãã
No.687Dengan kesaktian Indukmu2023幎3æ17æ¥ 16:07
ãªã€ã©ãŒç©ã¯https://ja.wikipedia.org/wiki/%E3%82%AA%E3%82%A4%E3%83%A9%E3%83%BC%E7%A9%8Dã«ãããŸããã
(ïŒ-1/2^2)(1-1/3^2)(1-1/5^2)(1-1/7^2)(1-1/11^2)ã»ã»ã»Î¶(2)=1 ---(1)
ãšãªã£ãŠããŸãã
ãããã
{(2^2-1)/2^2}{(3^2-1)/3^2}{(5^2-1)/5^2}{(7^2-1)/7^2}{(11^2-1)/11^2}ã»ã»ã»Î¶(2)=1 ---(2)
{(2+1)(2-1)/2^2}{(3+1)(3-1)/3^2}{(5+1)(5-1)/5^2}{(7+1)(7-1)/7^2}{(11+1)(11-1)/11^2}ã»ã»ã»Î¶(2)=1 ---(3)
ããã
{(2+1)(2-1)}{(3+1)(3-1)}{(5+1)(5-1)}{(7+1)(7-1)}{(11+1)(11-1)}ã»ã»ã»Î¶(2)=2^2 3^2 5^2 7^2 11^2ã»ã»ã»ã»
---(4)
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No.620ããããã¯ã¡ã¹ã2023幎3æ11æ¥ 12:36
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2023幎3æ14æ¥ 20:44 1/(n^3(n+1)^3)=(6n^2-3n+1)/n^3-(6(n+1)^2+3(n+1)+1)/(n+1)^3
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=(21-2Ï^2)/32
No.670ãããã2023幎3æ14æ¥ 23:06
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