JEE Main 2019 Mathematics question
The sum of an infinite geometric series with positive terms is 3 and the sum of the cubes of its terms is . Then the common ratio of this series is:
Answer: (C)
Solution
⇒ ⇒ r = 2/3.
The sum of an infinite geometric series with positive terms is 3 and the sum of the cubes of its terms is . Then the common ratio of this series is:
⇒ ⇒ r = 2/3.