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C++ program to find Nth term of the series 1, 8, 54, 384…
In this problem, we are given an integer N. Our task is to create a program to Find Nth term of series 1,8, 54, 384 ...
Let’s take an example to understand the problem,
Input
N = 4
Output
384
Explanation
4th term − (4 * 4 * (4!) = 384
Solution Approach
A simple approach to solve the problem is by using the general formula for the nth term of the series. The formula for,
Nth term = ( N * N * (N !) )
Program to illustrate the working of our solution,
Example
#include <iostream>
using namespace std;
int calcFact(int N) {
int fact = 1;
for (int i = 1; i <= N; i++)
fact = fact * i;
return fact;
}
int calcNthTerm(int N) {
return ( N*N*(calcFact(N)) );
}
int main() {
int N = 5;
cout<<N<<"th term of the series is "<<calcNthTerm(N);
return 0;
}Output
5th term of the series is 3000
Updated on: 15-Mar-2021
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