lenagonzalez84 lenagonzalez84

09-11-2021
Mathematics

contestada

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

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lmohamedali2008 lmohamedali2008

09-11-2021

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

20 x 4n = 80-1 = 79

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