Mathematics
Senior High
この問題教えてください!
習ってないので少しだけ説明してもらえると嬉しいです!
練習 次の数列が等差数列であるとき, xの値を求めよ。
9
(1) 3, x, 11, ...
1
1
(2)
1
12
x'6'
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