MathematicsLet f(n) denotes the number of different ways the positive integer n can be expressed as the sum of 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
Let f(n) denotes the number of different ways the positive integer n can be expressed as the sum of 1’s and 2’s. For example f(4) = 5
