passwella.
Menu

OAU Post-UTME Mathematics 2022 (Batch A) Question 14

Question 14

Progressions

The first and the second terms of a geometric progression are 4 and 8 respectively. Find the sum of the first 10 terms of the progression

  1. A.220
  2. B.4010
  3. C.4092
  4. D.2090
Show the answer and explanation

Answer: C (4092)

Explanation

a = 4 and r = 2. S10 = 4(210 − 1)/(2 − 1) = 4 × 1023 = 4092.