Question

In the following arithmetic sequence, what is n?

{−1,n,13...}

Answer 1

The given AP Series is -1, n, 13......

In AP the difference is equal

Hence,

n - (-1)  =  13 - n

n + 1  =  13 - n

n + n  =  13 - 1

2n  =  12

n  =  12/2

n  =  6.

Answer :

The value of n is 6.