在系列3、14、39、84中找到第N个术语。

给定数字N。任务是编写一个程序来查找以下系列中的第N个术语：

3, 14, 39, 84…

例子：

Input: 3
Output: 39
For N = 3
Nth term = ( 3*3*3 ) + ( 3*3 ) + 3
         = 39

Input: 4
Output: 84

计算系列第N个项的公式：

Nth term = ( N*N*N ) + ( N*N ) + N 

以下是所需的实现：

C++

// CPP program to find N-th term of the series:
// 3, 14, 38, 84...
#include 
using namespace std;
 
// calculate Nth term of series
int nthTerm(int N)
{
    return (N * N * N) + (N * N) + N;
}
 
// Driver Function
int main()
{
    int N = 3;
 
    cout << nthTerm(N);
 
    return 0;
}

Java

// Java program to find Nth number
import java.io.*;
 
// calculate Nth term of this series
class GFG
{
public int nthTerm(int N)
{
    // By using above formula
    return (N * N * N) + (N * N) + N;
}
 
// Driver Code
public static void main(String[] args)
{
    int N = 3;
    GFG a = new GFG();
 
    // call and print Nth term
    System.out.println(a.nthTerm(N));
}
}

Python 3

# Python 3 program to find  N-th
# term of the series:
# 3, 14, 38, 84...
 
# Function to calculate Nth term of series 
def nthTerm(n) :
 
    return (N * N * N) + (N * N) + N
 
# Driver code
if __name__ == "__main__" :
 
     N = 3
 
     # function calling
     print(nthTerm(N))
 
# This code is contributed by ANKITRAI1

C#

// C# program to find Nth number
using System;
 
// calculate Nth term of this series
class GFG
{
public int nthTerm(int N)
{
    // By using above formula
    return (N * N * N) + (N * N) + N;
}
 
// Driver Code
public static void Main()
{
    int N = 3;
    GFG a = new GFG();
 
    // call and print Nth term
    Console.WriteLine(a.nthTerm(N));
}
}
 
// This code is contributed
// by inder_verma.

Javascript

 
// JavaScriptprogram to find N-th term of the series:
// 3, 14, 38, 84...
 
// calculate Nth term of series
function nthTerm( N)
{
    return (N * N * N) + (N * N) + N;
}
 
// Driver Function
 
    let N = 3;
    document.write(nthTerm(N));
     
// This code contributed by Rajput-Ji
 

输出：

39