Question

Which of the following is not in Geometric Progression?

• A. \(-2,\ -6,\ -18,\ \ldots\)
• B. \(64,\ -32,\ 16,\ \ldots\)
• C. \(3,\ 6,\ 12,\ \ldots\)
• D. \(5,\ 55,\ 555,\ \ldots\)

Hint:

For a Geometric Progression: \[ \frac{\text{Next Term}}{\text{Previous Term}} \] must remain constant throughout the sequence. If the ratio changes even once, the sequence is not a G.P.

Answer 1

The Correct Option is D