Question

Find the a_n and 10th term of the progression: 3, 1, 17, 24, ……​

Answer 1

The series is not in A.P. because,

a₂-a₁  ≠ a₃-a₂

⇒1 - 3 ≠ 17 - 1

⇒ -2 ≠ 16

So, the 10th term and a_n can't be calculated here in this case.