Mathematics
Senior High
一枚目が問題で二枚目が解説です。2枚目の最後の式の＋1ってどういう意味ですか？
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FT @玉タタ竣大の洲々が盛0雇み/
)f盾Gf之手6 ららとの確腔目のJ 演 0g
at2ESSEO 全
Cn4=f14・1,・…・, 14・引 (⑥C
4ngnC=170} z(4nBnOの=ュ1
よって, 求める個数は
z(4U万Uの)
= x(4)十z(8)十zx(C)一(4n応)
ー-%nO)一x(Cn4Tw(4nBnO)
ー 40十16二11一82一5十1 =53 (個)
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