# 程序找到级数3,7,13,21,31的第n项…..

2021年4月29日18:23:42 发表评论 1,500 次浏览

## 本文概述

3、7、13、21、31, ……。

``````Input: N = 4
Output: 21
Explanation:
Nth term = (pow(N, 2) + N + 1)
= (pow(4, 2) + 4 + 1)
= 21

Input: N = 11
Output: 133``````

## C ++

``````//CPP program to find the Nth term of given series.
#include <iostream>
#include <math.h>
using namespace std;

//Function to calculate sum
long long int getNthTerm( long long int N)
{
//Return Nth term
return ( pow (N, 2) + N + 1);
}

//driver code
int main()
{
//declaration of number of terms
long long int N = 11;

//Get the Nth term
cout <<getNthTerm(N);

return 0;
}``````

## Java

``````//Java code to find the Nth term of given series.
import java.util.*;

class solution
{

//Function to calculate sum
static long getNthTerm( long N)
{

//Return Nth term
return (( int )Math.pow(N, 2 ) + N + 1 );
}

//Driver program
public static void main(String arr[])
{

//declaration of number of terms
long N = 11 ;

//Get the Nth term
System.out.println(getNthTerm(N));

}
}
//THis code is contibuted by
//Surendra_Gangwar``````

## Python3

``````# Python3 Code to find the
# Nth term of given series.

# Function to calculate sum
def getNthTerm(N):

# Return Nth term
return ( pow (N, 2 ) + N + 1 )

# driver code
if __name__ = = '__main__' :

# declaration of number of terms
N = 11

# Get the Nth term
print (getNthTerm(N))

# This code is contributed by

## C#

``````//C# code to find the Nth
//term of given series.
using System;

class GFG
{

//Function to calculate sum
static long getNthTerm( long N)
{

//Return Nth term
return (( int )Math.Pow(N, 2) + N + 1);
}

//Driver Code
static public void Main ()
{

//declaration of number
//of terms
long N = 11;

//Get the Nth term
Console.Write(getNthTerm(N));
}
}

//This code is contibuted by Raj``````

## 的PHP

``````<?php
//PHP program to find the
//Nth term of given series

//Function to calculate sum
function getNthTerm( \$N )
{
//Return Nth term
return (pow( \$N , 2) + \$N + 1);
}

//Driver code

//declaration of number of terms
\$N = 11;

//Get the Nth term
echo getNthTerm( \$N );

//This code is contributed by Raj
?>``````

``133``