Question

find the sum of the following. A.P 1+3+5+.....+119 ​

Answer 1

3600

Hope this helps you and please mark it as brain list

Answer 2

Answer:

AP is 1,3,5,7....199

a=1d=2 and last term l=199

tn =a+(n−1)d

⇒199=1+(n−1)×2

⇒(n−1) 2 =198

⇒(n−1)=99n=100

∴sum= 2n [a+l]= 2100

[1+199]= 2100 ×200=10000

please mark as branlist plzzzzz

stay safe and happy