Question

how many terms of the sequence 18,16,14..... should be taken their sum is zero

Answer 1

✌heyy !!
mate




AP: 18 ,16,14
a=18
d=-2

✴let the sum of nth term is zero then,


Sn=>1/2 {2a+(n-1)d}=0
=>1/2{36+(n-1)-2}=0
=>(n-1)-2=-36
=>n-1=18
=>n=19




●hence,sum of 19 term of the sequence is zero






✌✌hope it helps✌✌