Mathematics
Senior High

(1)(2)教えてくださいkとnが混ざってしまいます

□ 60 次の数列の和を求めよ。 07012(2n-1), 4(2n-2), 6(2n-3), ......, 2n(2n-n) 1². n, 2².(n-1), 3².(n-2), ..., (n−1)².2, n².1

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