Answer: Squares of natural numbers.
- A An AP with common difference 3
- B A GP with common ratio 2
- C Squares of natural numbers
- D An HP with reciprocals in AP
Correct answer: C. Squares of natural numbers
Explanation: 1², 2², 3², 4²,... are squares of natural numbers. Not an AP (differences: 3,5,7) or GP.
Bar heights for AP 2, 5, 8, 11 with the common difference d=3 marked between consecutive terms.
Concept context
Arithmetic progressions, geometric progressions, and sums