Question

sum of the term of an arithmetic squence having 5 terms is 105.
(a)what is the third term of the sequence?
(b) what is the sum of the first term and the fifth term?​

Answer 1

Answer:

b) 42

sum of the series = n/2 (a+l)

105= n/2 (a+l)

a+l = 42

so hence sum of the 1st term and 5th term(last term)