Question

is the third and 9th term of an ap are 4 and -8 respectively which term of the ap is zero? (step by step solve this question) ​

Answer 1

Step-by-step explanation:

Third Term = a + 2d = 4.........I

Ninth Term = a + 8d = -8........II

On solving the above equation by any method we will get,

d = -2

a = 8

Then, which term will be 0. So,

L = a + (n - 1)d

0 = 8 + (n - 1)-2

0 = 8 -2n +2

0 = 10 -2n

2n = 10

n = 5...................Ans

Thus, The 5th term will be 0.