Given 3 + 7 + 11 + 15 + ... find S20

Leesha asked Dec 21, 2022

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Leesha asked Dec 21, 2022

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7 votes

=4n - 1
Since the sequence is add 4 and 3-4 = -1

20 x 4n = 80-1 = 79

Khusnanadia answered Dec 28, 2022

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