Question

Find the sum of the Arithmetic Series upto 36 terms 2, 5, 8, 11,...

Answer 1

hope this answer will help you.

Answer 2

using formula
$(n \div 2)(2a + (n - 1)d)$
it becomes (36/2)×(2×(2)+(35)3)=(18)×(4+105)=18×109=1962