Ask a New Question

Question

An arithmetic series has first term 5 and a common difference 7

a) write down the 4th term and the 23rd term


b) find the sum of the first 38 terms of this series.
Apr 26, 2016

Answers

Tn = 5 + 7(n-1) = 7n-2

S38 = 38/2 (2*5 + 37*7)
Apr 26, 2016

Related Questions

An arithmetic series has a first term of -4 and a common difference of 1. A geometric series has a f... An arithmetic series has first term -50 and common difference 4. How many terms are in the series so... the sum of the first n terms of an arithmetic series is 2n(10-n) a.) what is the first term of the... First n term of an arithmetic series iso viven bu Sn=5/2n²+7/2n determine the first term,the common...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use