Let f(n) denotes the number of different ways, the positive integer n ca be expressed
Channel: Doubtnut
Date: 2020-05-24

Let f(n) denotes the number of different ways, the positive integer n ca be expressed as the sum of the 1's and 2's. for example, f(4)=5.  i.e., `4=1+1+1+1`  `=1+1+2=1+2+1=2+1+1=2+2`  Q. The number of solutions of the equation `f(n)=n`, where `n in N` is