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k=1∑∞​(9k1​−9k+21​) k=1∑∞​(1+k4​)5k k=1∑∞​k2+4k+31​

Posted: Thu Jul 14, 2022 4:22 pm
by answerhappygod
K 1 9k1 9k 21 K 1 1 K4 5k K 1 K2 4k 31 1
K 1 9k1 9k 21 K 1 1 K4 5k K 1 K2 4k 31 1 (16.85 KiB) Viewed 40 times
k=1∑∞​(9k1​−9k+21​) k=1∑∞​(1+k4​)5k k=1∑∞​k2+4k+31​