Find the sum of 2 4 6 ....... 20.?
Answers!
sum = n/2(2a+(n-1)d)
a=2
d=4-6=2
n=10
sum = 10/2(2(2)+(10-1)2)
= 5(4+18)
=5(22)
=110
Comment
Answer the question...
sum = n/2(2a+(n-1)d)
a=2
d=4-6=2
n=10
sum = 10/2(2(2)+(10-1)2)
= 5(4+18)
=5(22)
=110
Comment