engineering recuitment GATE CSE 2023-24 Test Series Engineering Mathematics Combinatorics Generating Functions
Given the recurrence relation f(n) = (n - 1) + f(n - 1), n > 72, f(2) = 1, then f(n) is:
1
\(\dfrac{3}{2}n(n-1)\)
2
\(\dfrac{n(n+1)}{2}\)
3
\(\dfrac{n(n-1)}{2}\)
4
\(\dfrac{3}{2}n(n+1)\)