Mathematics
Senior High
Solved
次の写真の和を求める問題で、赤線を引いた式の所で1/3掛けるのはなぜですか?
分かりやすく教えて下さると嬉しいです。
(⑤ Ss各*祝
本
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電電 BS、
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(3t_ 2) (3t1)
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