plzz solve question no. 4 exam is day after tommorow
Attachments:
achuaiswarya112:
Just substitute n=1,2,3 then ull get the answer
Ans
Is 15
Yes it is.
Answers
Answered by
6
Answer- nth term = (2n+1)
If nth term is given then it is nothing but the formula to find the nth term
Step-by-step explanation:
Take "n" as 1
you will get the first term
=>(2x1)+1=3
first term , a=3
n=2
(2x2)+1=5
d= 5 - 3 = 2
sum = n/2(2a+(n-1)d)
after calculation
sum of three terms= 15
Similar questions