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ãšèšãããŠããŸãããæãçŽã§ã¯ãã§ããã¿ããã§ããã
No.342ks2022幎10æ18æ¥ 16:24
æãçŽã䜿ããšè§ã®ïŒçåã¯ãããïŒçåãã§ãããããã§ããã
å®æšãšã³ã³ãã¹ãšã§ã¯åºæ¥ãªãæ£ïŒïŒè§åœ¢ã®äœå³ãã§ãããšãã
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https://core.ac.uk/download/pdf/59041733.pdf
No.343Dengan kesaktian Indukmu2022幎10æ19æ¥ 06:54
å¹³é¢ã«ïŒç¹A,B,Cããšããä»è§â ABCãïŒçåããããšãè©Šã¿ãã
äœãå®èŠã«ïŒã€ã®å·ããããã¯ç®å°ãšããŠP,Qã®ïŒç¹ãããžãã¯ã§å°ãä»ããŠããã
â ïŒçŽç·ABäžã«ç¹BããPQã®è·é¢ãšåãé·ããšãªãããã«ãããã«ç¹Oããšãã
â¡ ; ç¹OãéãçŽç·BCã«å¹³è¡ãªç·ODãåŒãã
⢠; ç¹Oãäžå¿ãšããŠååŸOB(=PQ)ã§ããåãæãã
⣠; å®èŠãç¹Bãéãæ§ã«ããŠãç¹Pãåãšç¹QãçŽç·ODãšéãªãæ§ã«èª¿æŽãããå®èŠã«ç·BEãåŒãã
ãã(説æã®ããã«åãšçŽç·(=OD)ãšã®äº€ç¹ãããããP,Qãšåä»ããã)
以äžã®äœæ¥ãã
â³OPQ,â³OBPã¯äºç蟺äžè§åœ¢ãã
â POQ=â PQO=Ξããªã
â OPB=â OBQ=2Ξãã§
ãŸãå¹³è¡ãã
â OQB=â CBQ=Ξ
ãããã
â ABC=3Ξ
ãããã£ãŠè§â ABCã®ïŒçåç·ã®äžã€ã¯çŽç·BEã§ãã
åŸã¯è§â ABE=2ΞãåŸæ¥ã®ããæ¹ã§ãããïŒçåããã°ããã
ïŒå®èŠã®ç®çãçŽç·ããã åŒããšãã圹ç®ã«ãã¡ãã£ãšæãå ããã ãã§å
šãŠãå€åãã
ãããšãé¢çœãã§ãã
No.344GAI2022幎10æ19æ¥ 07:09
> åŸã¯è§â ABE=2ΞãåŸæ¥ã®ããæ¹ã§ãããïŒçåããã°ããã
ãã£ããããããè£å©ç·ããããŸãã®ã§ããããå©çšããŠ
Qãäžå¿ãšããŠPãéãåãæããŠãåOãšã®Pã§ãªã亀ç¹ãFãšããã°
BFãããäžã€ã®äžçåç·ã«ãªããŸããã
No.345ãããã2022幎10æ19æ¥ 10:08
> ⣠; å®èŠãç¹Bãéãæ§ã«ããŠãç¹Pãåãšç¹QãçŽç·ODãšéãªãæ§ã«èª¿æŽãããå®èŠã«ç·BEãåŒãã
ãã®æ¡ä»¶ãæºããå®èŠã®è§åºŠã¯å
šéšã§ 6 ã€ãããŸãã
2 ã€ã¯ç¹ Q ãç¹ O ã«ãããå®èŠãçŽç· AB ã«éããŠçœ®ãæ¹æ³ã
1 ã€ã¯ç¹ P ãç¹ B ã«éããç¹ Q ã¯ç¹ O ãšç°ãªããšããã«çœ®ãæ¹æ³ã
ãã® 3 ã€ã¯æããã«ç®çã®ç·ã§ã¯ãªãã®ã§é€å€ãããšããŠã
æ®ã 3 ã€ã®ãã¡ã©ã®ç·ã䜿ã£ãŠäœå³ããã°ããã®ã§ããããïŒ
éè§ã®å Žåã¯å
è§ã« 1 ã€ãšå€è§ã« 2 ã€ãªã®ã§å
è§ã«ãããã€ãéžæããã°ãããšããŠããéè§ã®å Žåã¯å
è§ã« 2 ã€ãããŸãã
No.346DD++2022幎10æ21æ¥ 23:06
éè§ã®å Žåã¯éè§ã§ããå€è§ãäžçåããã®ã¡ã«äžçåç·ããå€åŽã«60°ã®è§åºŠããšãã°
éè§ã®äžçåç·ãã§ããŸãã®ã§ãéè§ã ãäžçåã§ããã°ååãšãèšããŸããã
No.347ãããã2022幎10æ22æ¥ 15:50
https://ja.wikipedia.org/wiki/%E3%83%9F%E3%83%B3%E3%82%B3%E3%83%95%E3%82%B9%E3%82%AD%E3%83%BC%E3%81%AE%E7%96%91%E5%95%8F%E7%AC%A6%E9%96%A2%E6%95%B0
ã«ãã³ã³ãã¹ããŒã®çå笊é¢æ°(?(x))ãšãããã®ãèããããŠããã
話ãéå®ããããã«ä»èããïœã®ç¯å²ã[0,1]åºéã®æçæ°åã³ïŒæ¬¡ç¡çæ°(a+b*sqrt(p))
(a,b;æçæ°,p;å¹³æ¹å åãå«ãŸã¬æŽæ°)ãšããã°
xãæçæ°ãªãé£åæ°è¡šç€ºã¯æéã§ãïŒæ¬¡ç¡çæ°ãªãããéšåãããµã€ã¯ã«ãç¹°ãè¿ãããã
ããããŠxã®é£åæ°è¡šç€ºã2ã®ææ°éšãžçšããããšã§ãããã«å®çŸ©ããã?(x)é¢æ°ã¯åºé[0,1]
ããããèªèº«ãžã®å
šå°å¯Ÿå¿ã®å調å¢å ãªé£ç¶é¢æ°ãäžããã
ãã®é¢æ°ãå©çšããŠèšç®ããŠã¿ããš
?(1/2)=1/2
?(2/3)=3/4
?(3/5)=5/8
?(5/8)=11/16

?(10/19)=513/1024
çã
xãæçæ°ãªãèšç®çµæã¯å¿
ãåæ¯ã¯å¶æ°(ããã2ã®åªã«éãã)
ããã§ãèšç®çµæã«çç®ã
1/2=?(1/2)
1/4=?(1/3)
3/4=?(2/3)
1/8=?(1/4)
3/8=?(2/5)
5/8=?(3/5)
7/8=?(3/4)
1/16=?(1/5)
3/16=?(2/7)
5/16=?(3/8)
7/16=?(3/7)
9/16=?(4/7)
11/16=?(5/8)
13/16=?(5/7)
15/16=?(4/5)

ãããšåæ¯ãïŒã®åªã§ã¯ãªãä»ã®å¶æ°ãããã³å¥æ°ã®ãã®ã¯2次ç¡çæ°ã䜿ãããšã®çµæãšããŠ
çºçããã
äŸãã°
2/3=?((sqrt(5)-1)/2)
1/5=?((2-sqrt(2))/2)
1/6=?((5-sqrt(5))/10)

ããã§
a[i]/7=?(x[i])
ããã«a[i]=i (i=1,2,3,,6)
ã®çµæãäžãã[0,1]åºéã«ãã2次ç¡çæ°x[i] ïŒi=1,2,3,,6)
ã®å
·äœçæ瀺åŒãæ±ããŠã»ããã
ã§ããã°
1/10,3/10,7/10,9/10ãäžãããã¯ã2次ç¡çæ°y[j] (j=1,2,3,4)ã
No.336GAI2022幎10æ17æ¥ 07:28
x[1]=2-â3
x[2]=(â3-1)/2
x[3]=(3-â3)/3
x[4]=â3/3
x[5]=(3-â3)/2
x[6]=â3-1
y[1]=(3-â2)/7
y[2]=(4-â2)/7
y[3]=(3+â2)/7
y[4]=(4+â2)/7
ã§ããããã
No.337ãããã2022幎10æ17æ¥ 14:55
ãŸãããå
šåæ£è§£ã§ãã
ïŒæ¬¡ç¡çæ°ãæçæ°ãžååããã¢ã€ãã¢ãããæãã€ããã®ã§ããã
ãšããããã§
[0,1]åºéã§
?(x)=x
ãæºããxã¯0,1/2,1以å€ã«ãååšããŠããŸããããã®å€ã¯ïŒ
çå±çã«ã¯ãã®å€ã¯ïŒæ¬¡ç¡çæ°ã®ã¯ãã§ãããã
No.338GAI2022幎10æ17æ¥ 15:55
0.42037233942322307564099300664622187394918986660061âŠ
ãšããå€ã«ãªããŸãããããã¯2次ç¡çæ°ã§ã¯ãªãã§ããã
ïŒããxã2次ç¡çæ°ãªã?(x)ã¯æçæ°ãªã®ã§?(x)=xã«ã¯ãªããŸããïŒ
No.339ãããã2022幎10æ17æ¥ 16:54
ãããïŒ
äŸã®äžåç¹ã®å°æ°ç¬¬37äœãŸã§ãäœãïŒæ¬¡ç¡çæ°ã§
gp > (sqrt(3219756132232550086641835218537)-1054710584836911)/(2*879764482467118)
%67 = 0.42037233942322307564099300664622187395
ãäœããã®ã§ãŠã£ããå¯èœã ãããšæã£ãŠããŸã£ãã
?(x)é¢æ°ã¯é£ç¶ã§ã¯ãªããã§ãããPi/4ãâ2ãªã©ã®ç¹ã§ã¯ç¹ãããªãã
æ°ã£ãŠã©ãã ããããã ã£ãŠããšã§ããã
ã¡ãªã¿ã«
1-0.42037233942322307564099300664622187394918986660061âŠ
=0.57962766057677692435900699335377812605
ãäžåç¹ãšãªããŸããã
No.340GAI2022幎10æ17æ¥ 18:32
> ?(x)é¢æ°ã¯é£ç¶ã§ã¯ãªããã§ããã
é£ç¶é¢æ°ãšæžãããŠããŸãã
Pi/4ãªã©ã®æ°ã§ããäžãšäžããæçæ°ã§æŒãããã°?(x)ããããã§ãè¿ãå€ã«ãªããŸãã®ã§ã
ãã®æçæ°ã®æ¥µéãšããŠè¡šãããPi/4ããã®éã®å€ãšããŠå®çŸ©ãããé£ç¶ã«ãªããŸããã
No.341ãããã2022幎10æ17æ¥ 19:04
䜿ãæ°åã6ãšçŽ ã§ãããã®
{1,5,7,11,13,17,19,23,25,29,31,35,}
ãé çªã«åæ¯ã«äœ¿ã£ãŠããïŒååã¯åžžã«1ïŒ
ç¹ãã§ãã笊å·ã
(1)+,-,+,-,+,-,ãšäº€äºã«ããŠãããå³ã¡
S1=1/1-1/5+1/7-1/11+1/13-1/17+
(2)+,+,+,+,-,-,-,-,+,+,+,+,ãš4åãã€ã§äº€äºã«ããŠããã
S2=1/1+1/5+1/7+1/11-1/13-1/17-1/19-1/23+1/25+
(3)+,+,-,-,+,+,-,-,ãš2åãã€ã§äº€äºã«ããŠããã
S3=1/1+1/5-1/7-1/11+1/13+1/17-1/19-1/23+
(4)+,-,-,+,+,-,-,+,+,-,-,+,ãš4åã®ãã¿ãŒã³ãç¹°ãè¿ããŠããã
S4=1/1-1/5-1/7+1/11+1/13-1/17-1/19+1/23+1/29-
ããŠããããŠéããŠè¡ããšããååS1,S2,S3,S4ã¯åŠäœãªãå€ã«ãªããã®ãïŒ
æ瀺åŒã§è¡šããŠäžããã
No.320GAI2022幎10æ4æ¥ 06:53
S1 = Ï/(2â3)
S2 = Ï/â6
S3 = Ï/3
S4 = log(2+â3)/â3
ããªïŒ
No.321ãããã2022幎10æ4æ¥ 15:19
å
šãŠæ£è§£ã§ãã
(4)ã¯asinh(â3)/â3ã(asinh(x)ã¯ãã€ãããªãã¯ã¢ãŒã¯ãµã€ã³)ã®åŒã§ãå¯ã§ãã
No.322GAI2022幎10æ4æ¥ 19:50
調åæ°åããçºæ£ããããšããã
çå·®æ°åã®éæ°åãçºæ£ããã
å
¬å·®ãããã€ã§ããéã空ããŠããçºæ£ããã
No.323ks2022幎10æ5æ¥ 10:36
çå·®æ°åã®éæ°åãçºæ£ããã
ã ã笊å·ã亀äºã«ãã亀代çŽæ°ã«ãããšåæã§ããŸãã
åé
ã1ãå
¬å·®ãdã«ãããš
d=1; S1=1-1/2+1/3-1/4+1/5-1/6+=log(2)
d=2; S2=1-1/3+1/5-1/7+1/9-1/11+=Ï/4
d=3; S3=1-1/4+1/7-1/10+1/13-1/16+=(Ï+â3*log(2))/(3*â3)
d=4; S4=1-1/5+1/9-1/13+1/17-1/21+=â2/8*(Ï+2*log(1+â2))
d=5; S5=1-1/6+1/11-1/16+1/21-1/26+=(2*log(2)+â(2+2/â5)*Ï+â5*log((3+â5)/2))/10
d=6; S6=1-1/7+1/13+1/19-1/25+1/31-1/37+=0.9037717737487720468
d=7; S7=0.91547952683
d=8; S8=0.92465170577
d=9; S9= 0.93203042415
No.324GAI2022幎10æ5æ¥ 11:41
S6ãšS8ã¯
S6=(Ï+(â3)log(2+â3))/6
S8=(â(4+2â2)Ï+â(2-â2)log(7-4â2+2â(20-14â2))+â(2+â2)log(7+4â2+2â(20+14â2)))/16
ãšæžããŸããã
No.325ãããã2022幎10æ5æ¥ 14:04
ã©ãããŠS7ãé£ã°ããŠS8ïŒãããçµæ§è€éïŒãåºãããã®ã ãããš
äœæ°ã«S7ãžææŠããŠãããããã£ã·ããšæéããšãããŠ
S7=1/7*(log(2)-2*sin(Ï/14)*log(2*sin(3*Ï/14))-2*cos(Ï/7)*log(2*sin(Ï/14))+2*sin(3*Ï/14)*log(2*cos(Ï/7)))+Ï/28*tan(Ï/14)+1/tan(Ï/14))
ãªã決ããŠçŸããã¯ãªãåŒã§ããã
ãªãã¹ãçµ±äžããŠ
t=sin(Ï/14)ãšçœ®ããŠ
S7=1/7*(log(2)-2*t*log(2*(3*t-4*t^3))-2*(1-2*t^2)*log(2*t)+2*(3*t-4*t^3)*log(2*(1-2*t^2)))+Ï/(28*t*sqrt(1-t^2))
ã§å°ãã¯ã·ã§ãŒãã«
No.326GAI2022幎10æ5æ¥ 18:06
S7ã®åŒãããããåããŠäœãšãããããªåœ¢ã«ãããšããã
S3,S5,S7,S9ã¯åã圢ã§æžããããšãããããŸããã
S3=(2/3){Ï/(4sin(Ï/3))
-cos(Ï/3)log(sin(Ï/6))}
S5=(2/5){Ï/(4sin(Ï/5))
-cos(Ï/5)log(sin(Ï/10))
-cos(3Ï/5)log(sin(3Ï/10))}
S7=(2/7){Ï/(4sin(Ï/7))
-cos(Ï/7)log(sin(Ï/14))
-cos(3Ï/7)log(sin(3Ï/14))
-cos(5Ï/7)log(sin(5Ï/14))}
S9=(2/9){Ï/(4sin(Ï/9))
-cos(Ï/9)log(sin(Ï/18))
-cos(3Ï/9)log(sin(3Ï/18))
-cos(5Ï/9)log(sin(5Ï/18))
-cos(7Ï/9)log(sin(7Ï/18))}
n=2m+1ïŒmâ§1ïŒã®ãšã
Sn=(2/n){Ï/(4sin(Ï/n))-Σ[k=1ïœm]cos((2k-1)Ï/n)log(sin((2k-1)Ï/(2n)))}
ãæãç«ã¡ããã§ããã
(è¿œèš)
å¶æ°ã
S2=(2/2){Ï/(4sin(Ï/2))
-cos(Ï/2)log(sin(Ï/4))}
S4=(2/4){Ï/(4sin(Ï/4))
-cos(Ï/4)log(sin(Ï/8))
-cos(3Ï/4)log(sin(3Ï/8))}
S6=(2/6){Ï/(4sin(Ï/6))
-cos(Ï/6)log(sin(Ï/12))
-cos(3Ï/6)log(sin(3Ï/12))
-cos(5Ï/6)log(sin(5Ï/12))}
S8=(2/8){Ï/(4sin(Ï/8))
-cos(Ï/8)log(sin(Ï/16))
-cos(3Ï/8)log(sin(3Ï/16))
-cos(5Ï/8)log(sin(5Ï/16))
-cos(7Ï/8)log(sin(7Ï/16))}
ã®ããã«æžããããã§ãã
å¶å¥åãããŠ
Sn=(2/n){Ï/(4sin(Ï/n))-Σ[k=1ïœ[n/2]]cos((2k-1)Ï/n)log(sin((2k-1)Ï/(2n)))}
ã§OKã§ããã
ïŒå¥æ°ã®åŒã®Î£ã®çµå€ã®mã[n/2]ã«å€ããã ãã§ãïŒ
No.328ãããã2022幎10æ5æ¥ 21:55
æãã®æ¥µéå€ã¯ã¬ã³ãé¢æ°ïŒgamma(x))ãçæ°ã«ãšã£ã察æ°(log(gamma(x)))ã®
å°é¢æ°ããšã£ãd(log(gamma(x))/dxãpsi(x)é¢æ°ãšè¡šç€ºã
psi(x)=gamma'(x)/gamma(x)
ã®æ§è³ªãå©çšããããšã§ããã®å
¬å·®dïŒåé
ã¯1)ã®çå·®æ°åã®éæ°ã§ã®äº€ä»£çŽæ°ã®
極éåT(d)ã
T(d)=(psi((d+1)/(2*d))-psi(1/(2*d)))/(2*d)
ã§ç®åºã§ãããšãããããæ°å€ãç®åºããŠããŸããã
ä»åããããããã®åŒ
S(n)=(2/n)*(Pi/(4*sin(Pi/n))-sum(k=1,floor(n/2),
cos((2*k-1)*Pi/n)*log(sin((2*k-1)*Pi/(2*n)))))
ã§2ã€ã®æ°éãèŠèŒã¹ãŸããããã¿ãªïŒã€ã¯äžèŽããŸããã(n=1ã¯é€å€ïŒ
ãŸã以åãããªèšç®ãããŠããŠäžæè°ã«æã£ãããšã«
zeta(3) =1+1/2^3+1/3^3+1/4^3+1/5^3+
3/4*zeta(3)=1-1/2^3+1/3^3-1/4^3+1/5^3-
ã«ã¯ååšçãçŸããªãã®ã«(zeta(5)ã«ã)
1-1/3^3+1/5^3-1/7^3+1/9^3-1/11^3+ïŒÏ^3/32
äžã®å¿çšã§(psi''(3/4)-psi''(1/4))/128 ããèšç®å¯èœ('èšå·ã¯åŸ®åã瀺ãã)
1-1/3^5+1/5^5-1/7^5+1/9^5-1/11^5+ïŒ5*Ï^5/1536
(psi''''(3/4)-psi''''(1/4))/24576ãããèšç®å¯èœ
ãšå
¬å·®2ã§äº€ä»£çŽæ°ããšãã°ååšçã姿ãçŸããïŒä»ã®å
¬å·®dã§ã¯çŸããªããïŒ
ãã£ãªã¯ã¬ææš[1,-1,0]ã®Lé¢æ°ã§ã
1-1/2^3+1/4^3-1/5^3+1/7^3-1/8^3+1/10^3-1/11^3+=4*Ï^3/(81*sqrt(3))
1-1/2^5+1/4^5-1/5^5+1/7^5-1/8^5+1/10^5-1/11^5+=4*Ï^5/(729*sqrt(3))
ãã¯ãååšçãé¡ãã®ããããã
ããšã亀代çŽæ°çã§ããªã,ïŒç¬Šå·ã ãã®çå·®æ°åæ°ã®ãã®ã§ã
1/3^3+1/7^3+1/11^3+1/15^3++1/(4*n-1)^3+=7/16*zeta(3)-Ï^3/64
ãã¯ãååšçãé¡ãã®ããããã
ã»ãããšã«ç¡éã¯äžæè°ã§ãã
No.329GAI2022幎10æ6æ¥ 07:54
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