Question

22 +52 +82 + ... to 15 terms.find sum​

Answer 1

Answer:

The sum is 156.

Explanation:

22+52+82=156

Answer 2

a=22

d=52-22=30

n th team=15

sum=n/2(2a+(n-1)d)

so the ans is 15/2(44+(14×30))

15/2×464

15×232

=3480 ans