ieckert5 ieckert5

24-02-2021
Mathematics

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find the sum of the arithmetic sequence. -10,-7,-4,-1,2,5,8

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Littlecaesars Littlecaesars

24-02-2021

Answer:

example

Find the 21st term of: 2,8,14,20

a1=2

d=6

n=21

a21= 2+ (21-1)6

a21= 2+ (20)6

a21= 2+120

a21= 122

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