Mathematics

The first term a of an A.P is equal to twice the common difference d….

The first term a of an A.P is equal to twice the
common difference d. Find, in terms of d, the 5th
term of the A.P.
  • A.
    4d
  • B.
    5d
  • C.
    6d
  • D.
    a + 5d
  • E.
    2a + 4d
Correct Answer: Option C
Explanation

Tn = a + (n – 1)d; AP; a = 2d; Tn = 2d + (n – 1)d
T5 = 2d + (5 – 1)d = 2d + 4d = 6d