Black Book | Functions | Q45 | JEE | Single Choice Problem

Given f(1) = 1 and f(n) = 2Σf(r), find Σf(r). Spot the recursive pattern and turn it into a geometric series. #RecursiveFunction #Series. 0:00 Understanding the problem statement 1:05 Pattern recognition through individual terms 3:06 Recursive relation f(n+1) = 3f(n) 7:03 Generalizing the term f(n) 8:16 Summation as a geometric series 10:47 Final answer option C