Mathematics Hard css fpsc ppsc

The sum of a geometric series with a=2 r=3 and 4 terms is?

Q: The sum of a geometric series with a=2 r=3 and 4 terms is?

Correct Answer: 80. Sum = a(rⁿ-1)/(r-1) = 2(3⁴-1)/(3-1) = 2(80)/2 = 80. The finite geometric series formula applies when r≠1. For infinite series with |r|<1 sum = a/(1-r). Geometric series appear in competitive exam sequences and progressions sections and in financial problems involving compound growth scenarios.

A 80
B 90
C 100
D 110

Correct Answer: Option A — 80

Explanation:

Sum = a(rⁿ-1)/(r-1) = 2(3⁴-1)/(3-1) = 2(80)/2 = 80. The finite geometric series formula applies when r≠1. For infinite series with |r|

9 views Back to Mathematics

Submitted by: PaperMCQs

Related MCQs

The average of 5 consecutive even numbers is 20. What is the largest number?

Click to view answer →

What is the value of (1/2) raised to the power of negative 2?

Click to view answer →

An item's price increased by 25% to Rs. 500. What was the original price?

Click to view answer →

Using the BODMAS rule, solve: 2 + 3 × (4 − 1) = ?

Click to view answer →

A bag has 5 red and 3 blue balls. What is the probability of drawing 2 red balls?

Click to view answer →

What is the inverse of the 2x2 matrix with rows [1 2] and [3 4]?

Click to view answer →

What is 75% of 320?

Click to view answer →

What is the value of C(5 2)?

Click to view answer →

What is the value of log base 10 of 1000?

Click to view answer →

Which of the following is a prime number?

Click to view answer →

Subject	Mathematics
Difficulty	Hard
Exam Types	css, fpsc, ppsc
Correct	Option A

The sum of a geometric series with a=2 r=3 and 4 terms is?

Related MCQs

MCQ Details

Practice More