PRC-2 · Chapter 3 · Question 41 of 45
In the GP formula for the sum of 'n' terms, if r > 1, the formula used is:
Test yourself: pick an answer
Reveal answer & explanation
Correct answer: A) a(r^n - 1) / (r - 1)
Explanation
While both formulas (A and B) are mathematically equivalent, formula A is preferred when r > 1 to work with positive numbers in the numerator and denominator.
More Mathematical Progression MCQs
- Q43The 'Arithmetic Mean' (AM) between two numbers 'x' and 'y' is defined as:
- Q44The 'Geometric Mean' (GM) between two positive numbers 'x' and 'y' is defined as:
- Q45If you add 4 to each term of an AP, the new sequence will:
- Q1What is the specific mathematical term for a succession of numbers formed and arranged according to a definite law or rule?
- Q2In an arithmetic progression, which mathematical formula is used to find the value of the 'nth' term?