The sum of the first 20 terms of the Arithmetic sequence is 1490
The first is 27
The common difference is 5
n= 20
The first 20 terms can be calculated as follows
Sn= n/2[2a+(n-1) d]
S20= 20/2(2×27 + (20-1) 5
S20= 10(54 + 95)
S20= 10(149)
S20= 1,490
Hence the sum of the first 20 terms is 1490
Read more on Arithmetic sequence here
https://brainly.com/question/20291584?referrer=searchResults
#SPJ1
