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HajimetenoLT vol.17
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hashimoto-kei
November 22, 2025
Science
1
68
HajimetenoLT vol.17
⚡️初めてのLT会 Vol.17 に登壇した際の資料です。
https://bootcamp.fjord.jp/events/187
hashimoto-kei
November 22, 2025
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Transcript
2025/11/22 hashimoto-kei ॳΊͯͷ LT ձ Vol. 17
ࣗݾհ
໊લɿhashimoto-kei
None
ग़ɿԬ
झຯɿαφ, Podcast
͖ͳຊɿNand2Tetris
None
ࠓͷςʔϚ
Λ࣋ͬͯΔ͜ͱ
🔥
͘͠Έ.math
None
None
ָ͠Έํ
ϓϩάϥϛϯά
ڝϓϩ ⏱
ݴޠॲཧ ⚙
ֶ
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ֶͷΈ ⚙
ڝϓϩ ⏱ ݴޠॲཧ ⚙
डݧֶ ⏱ ֶͷΈ ⚙
डݧֶ ⏱ ެཧओٛ ⚙
डݧֶ ⏱ ެཧओٛ ⚙ 👉
༡ΜͰΈΔ
🥳
ಉҰࢹ
None
🤔
2 ͭཁΔʁ
1 ͭͰेʂ
None
্ূ໌ࡁΈͱ͢Δ
্͔ΒԼΛಋ͘
None
Լͷࣜͷࠨล
্ͷࣜΛͬͯల։
ܭࢉ͢ΔͱɺԼͷࣜͷӈลʹͳΔ
🎉
ެཧओٛ
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͜ΕͲ͔͜Β ग़͖ͯͨͷʁ
ެཧ
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⚙
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࡞༻ɾ࡞༻ͷ๏ଇ
3 ͚ͭͩ
͜ͷ 3 ͭΛͬͯ ྗֶͷཧΛ࡞Δ
ྫ͑
ΤωϧΪʔอଘଇ
ӡಈྔอଘଇ
͜ͷ 2 ͭ ྗֶͷݪཧ͔Βಋ͔ΕΔ
1. ׳ੑͷ๏ଇ 2. ӡಈํఔࣜ 3. ࡞༻ɾ࡞༻ͷ๏ଇ 4. ΤωϧΪʔอଘଇ 5. ӡಈྔอଘଇ
6. etc…
1. ׳ੑͷ๏ଇ 2. ӡಈํఔࣜ 3. ࡞༻ɾ࡞༻ͷ๏ଇ 4. ΤωϧΪʔอଘଇ 5. ӡಈྔอଘଇ
6. etc… ݪཧ 3 ͚ͭͩ
⚙
ߴߍֶʹ ͍͔ͭ͘ެཧ͕ଘࡏ͢Δ
ྫ͑
݁߹๏ଇ ʢ࣮ͷʹؔ͢Δʣ
None
Ͳ͔͜Βͯ͠ OK
͠ࢉͷ 23 + 1 + 9999
͠ࢉͷ 23 + 1 + 9999 ͔ͬͪ͜Βઌʹܭࢉͯ͠ OK
ަ๏ଇ ʢ࣮ͷੵʹؔ͢Δʣ
None
ֻ͚ࢉೖΕସ͑ͯ OK
ֻ͚ࢉͷ 4 * 5 = 5 *4 = 20
ֻ͚ࢉͷ 4 * 5 = 5 *4 = 20 ೖΕସ͑ͯಉ͑͡
࣮ͷ๏ଇ
None
ࠨ͔Βͷ๏ଇ
ӈ͔Βͷ๏ଇ
1. ݁߹๏ଇʢ࣮ͷʣ 2. ަ๏ଇʢ࣮ͷੵʣ 3. ๏ଇʢࠨ/ӈ͔Βͷʣ
͜ͷ 3 ͭͷެཧΛͬͯ ઌ΄ͲͷࣜΛূ໌͢Δ
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None
2 ͷఆٛ
ࠨ͔Βͷ๏ଇ
ӈ͔Βͷ๏ଇ
ʹؔ͢Δ݁߹๏ଇ
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🎉
نଇੑ
ൺྻͷ
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ެࣜ
None
ؙ҉ه...?
😭
☝
☝
☝
ఆٛࣜͰे
ఆٛࣜͷ྆ลΛ r ഒͨ͠ͷΛλςʹฒΔ
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1 ͭӈʹζϥͯ͠ॻ͘ͷ͕ϙΠϯτʂ
ลʑΛҾ͘ͱ…
͕͜͜ফ͑Δʂ
None
݅ΛՃ
None
྆ลΛ 1 -r ͰׂΔͱ…
None
🎉
ҰൠԽ
Ҽղͷެࣜ
None
ؙ҉ه...?
😭
☝
☝
☝
ҰൠԽͰ͖Δ
None
ઌ΄ͲͷެࣜΛ ͬͯূ໌ͯ͠ΈΔ
࠶ܝ
None
None
͜ͷͱ͖ɺ ࣍ͷެ͕ࣜΓཱͭ
None
ఆٛࣜͱެ͔ࣜΒ ͕࣍Γཱͭ
None
྆ลʹ 1 - r Λֻ͚Δͱ…
None
r = 1 ͷͱ͖ Γཱͭ͜ͱʹҙʂ
͜͜Ͱ
None
Λೖͯ͠
྆ลʹ a^n Λֻ͚Δͱ…
None
a = 0 ͷͱ͖ Γཱͭ͜ͱʹҙʂ
🎉
ࢹ֮Խ
ճసߦྻ
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ؙ҉ه...?
😭
☝
☝
☝
ਤͰे 1
(1, 0) ͱ (0, 1) Λ θ ͚ͩճస 1
1 1
ࡾ֯ؔͷఆ͔ٛΒ ͕࣍Γཱͭ 1
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·ͱΊͯॻ͘ͱ
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Α͘ݟΔͱ୯Ґߦྻʹͳ͍ͬͯΔ
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ࢹ֮Խ
ࡾ֯ؔͷՃ๏ఆཧ
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ؙ҉ه...?
😭
☝
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ਤͰे
1 1
ճసߦྻʹ͍ͭͯ ࣍ͷ͕ࣜΓཱͭ
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β ͚ͩճసͤͯ͞ɺ͞Βʹ α ͚ͩճస Ұؾʹ α + β ͚ͩճస
࠶ܝ
None
͜ΕΛ͏ͱɺ ࣍ͷ͕ࣜΓཱͭ
None
͜͜Λܭࢉ͢Εɺsin(α + β) = sin α cos β + cos
α sin β ͕ಘΒΕΔ
͜͜Λܭࢉ͢Εɺcos(α + β) = cos α cos β - sin
α sin β ͕ಘΒΕΔ
🎉
End … ?
͍ΖΜͳָ͠Έํ
֮͑Δ͚ͩਏ͍😭
ߟ͑Δͷָ͍͠🥳
͘͠Έ.math
͓ʔ͍ɺүɺ ֶΖ͏ͥʂ⚾
⚙ ⚾
Thank you for listening!