Question

What is the sum of a 22-term arithmetic sequence where the first term is 57 and the last term is -27?

Answer 1

sum to nth term =\[\frac{ n }{ 2 } (a + l)\] where n= term number , a= first term, l= last term
can you figure out the sum by plugging in the values in formula? Ask freely if u need help here onwards :)

Answer 2

Yeahh, thank you!