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123lal
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Find the sum of the first 38 terms of the arithmetic sequence: 3, 8, 13, 18, 23, ...
 one year ago
 one year ago
123lal Group Title
Find the sum of the first 38 terms of the arithmetic sequence: 3, 8, 13, 18, 23, ...
 one year ago
 one year ago

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SandeepReddy Group TitleBest ResponseYou've already chosen the best response.0
Which series is it?
 one year ago

Jonask Group TitleBest ResponseYou've already chosen the best response.0
a=3 n=38 d=5 \[sum=n\frac{(2a+(n1)d)}{2}\]
 one year ago

SandeepReddy Group TitleBest ResponseYou've already chosen the best response.0
Its in the AP, because every next term has a constant difference with the preceding term
 one year ago

SandeepReddy Group TitleBest ResponseYou've already chosen the best response.0
So @Jonask Formula holds for it , apply and get the result.
 one year ago
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