2024 · Q22
What is the geometric mean of 3, 9, 27, 81, 243, 729, 2187 ?
Elementary MathematicsStatistics
- A81
- B105
- C144
- D243
Explanation
The numbers are 3¹, 3², …, 3⁷. Their geometric mean is (3^(1+2+…+7))^(1/7) = 3^(28/7) = 3⁴ = 81. This is option A.