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  • Arithmetic Progression Basics
  • In an AP, if d = -4, n=7, an = 4, then a is
Multiple choice

In an AP, if d = -4, n=7, an = 4, then a is

  1. 6

  2. 7

  3. 20

  4. 28

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

1:(d) 28[Soln: an = a + (n - 1)× d⇒ 4 = a + (7 - 1) × -4⇒ 4 = a - 24⇒ a = 4 + 24 = 28]

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