In an Ap the sum of n terms is 1/2(5n×n+3n).Find its 40th term.
Answers
Answered by
5
1/2(5*40*40+3*40)
1/2(8000+120)
1/2(8120)
=4060
Here you have to just put vale of n in it
Formula of Ap=a+(n-1)d
Hope this answer may help you
1/2(8000+120)
1/2(8120)
=4060
Here you have to just put vale of n in it
Formula of Ap=a+(n-1)d
Hope this answer may help you
Niks02:
and formula of ap=>An=a+(n-1)d
Oh thanx
Why is 1/2 there?
that is in your question bro
Ok
my next question
what
Can you answer that please?
ok
Please answer fast
Similar questions