/sci/ - Science & Math

Anonymous Fri Jul 8 23:38:29 2022 No.14637526 [View]
File: 3.30 MB, 1599x3114, __furude_rika_and_houjou_satoko_higurashi_no_naku_koro_ni_drawn_by_hazumi_otoya__cbc536a56310a299acccf253efe6e1db.jpg [View same] [iqdb] [saucenao] [google]

>>14637390
[eqn]
d_0 + 10d_1 + 100d_2 + 1000d_3 + \cdots \\
d_0 + (9+1)d_1 + (99+1)d_2 + (999+1)d_3 + \cdots \\
d_0 + 9d_1 + 1d_1 + 99d_2 + d_2 + 999d_3 + d_3 + \cdots \\
\underbrace { \left( 9d_1 + 99d_2 + 999d_3 + \cdots \right) }_{\text{definitely divisible by 3...}} \;\;\;\;\;\;\;\;\;\;\;\;\;\;\;\; + \underbrace { \left( d_0 + d_1 + d_2 + d_3 + \cdots \right) }_{\text{...so whether or not the entire number is divisble by 3 is decided by this}}
[/eqn]

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/sci/ - Science & Math

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