Question

Ok, the next problem is 1+5+9+...+401
So, first thing I did was use the arithmetic sequence formula a to the nth term=a1+(n-1)d So i plugged in 401=1+(4n-4) Ended up getting 101 for n
Then I used the sum of an aritmetic series formula s(101)=101(1+401)/2
Ended up with 40602/2 And got 20301 as the sum of all 101 terms. Is that correct Igbasallote?

Answer 1

yup

Answer 2

Thanks man

Answer 3

welcome

Answer 4

next time you can just tag

i.e. @lgbasallote

Answer 5

Just needed to teach myself (With some help) the method). And i will do that next time, sorry