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(d) n=2∑∞​(2n−1)(2n−3)2​

Posted: Thu Jul 14, 2022 4:43 pm
by answerhappygod
D N 2 2n 1 2n 3 2 1
D N 2 2n 1 2n 3 2 1 (7.09 KiB) Viewed 40 times
(d) n=2∑∞​(2n−1)(2n−3)2​