Question

52+54+56+...+70 what is answer when numbers start from any number and the number even number.
also show answer for even number​

Answer 1

a=52

d=54-52=2

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

s10=10/2(2(52)+9×2)

s10=5(104+18)

s10=5(122)

s10=. 610