Question

The 19^th term from the end of the series 2 + 6 + 10 + …. + 86 is

• A. 6
• B. 18
• C. 14
• D. 10

Answer 1

Answer: (C)

14

Answer 2

$86 = 2 + (n - 1)4$ ⇒ $n = 22$

19^th term from end$= t_{n - 19 + 1} = t_{22 - 19 + 1} = t_{4} = 2 + (4 - 1)4 = 14$