A series is given as $1,6,7,13,20,33,.......$ and so on Find the sum of first 52 terms?
what i know is
The sum of the first n Fibonacci numbers is the [(n + 2)nd Fibonacci number - 1] . So the sum of first 52 fibonacci numbers is [54th fibonacci number - 1]
now i have no clue about how to find nth no of a Fibonacci series . is there any method to evaluate nth term in Fibonacci series? here how can i find 54th term of the series?
note :: its a aptitude exam's question and on an average 1-2 mins allowed per question.so is there any faster method of finding nth term in a fibonacci series. i want to avoid the manual search procedure because its too time taking procedure