系列 2、12、36、80、150…中的第 n 项。
原文:https://www . geesforgeks . org/n-th-term-series-2-12-36-80-150/
给定系列 2、12、36、80、150..求数列的第 n 项。 例:
Input : 2
Output : 12
Input : 4
Output : 80
如果我们仔细看，我们可以注意到数列是自然数(1，4，9，16，25，…)的平方和立方的和..) + (1, 8, 27, 64, 125, ….). 因此该系列的第 n 个号码是n^2+n^3T3
C++
// CPP program to find n-th term of
// the series 2, 12, 36, 80, 150, ..
#include <iostream>
using namespace std;
// Returns n-th term of the series
// 2, 12, 36, 80, 150
int nthTerm(int n)
{
return (n * n) + (n * n * n);
}
// driver code
int main()
{
int n = 4;
cout << nthTerm(n);
return 0;
}
Java 语言(一种计算机语言，尤用于创建网站)
//java program to find n-th term of
// the series 2, 12, 36, 80, 150, ..
import java.util.*;
class GFG
{
// Returns n-th term of the series
// 2, 12, 36, 80, 150
public static int nthTerm(int n)
{
return (n * n) + (n * n * n);
}
// Driver code
public static void main(String[] args)
{
int n = 4;
System.out.print(nthTerm(n));
}
}
// This code is contributed by rishabh_jain
Python 3
# Python3 code to find n-th term of
# the series 2, 12, 36, 80, 150, ..
# Returns n-th term of the series
# 2, 12, 36, 80, 150
def nthTerm( n ):
return (n * n) + (n * n * n)
# driver code
n = 4
print( nthTerm(n))
# This code is contributed
# by "Sharad_Bhardwaj".
C
// C# program to find n-th term of
// the series 2, 12, 36, 80, 150, ..
using System;
class GFG
{
// Returns n-th term of the series
// 2, 12, 36, 80, 150
public static int nthTerm(int n)
{
return (n * n) + (n * n * n);
}
// Driver code
public static void Main()
{
int n = 4;
Console.WriteLine(nthTerm(n));
}
}
// This code is contributed by vt_m.
服务器端编程语言（Professional Hypertext Preprocessor 的缩写）
<?php
// PHP program to find n-th term of
// the series 2, 12, 36, 80, 150, ..
// Returns n-th term of the series
// 2, 12, 36, 80, 150
function nthTerm($n)
{
return ($n * $n) + ($n * $n * $n);
}
// driver code
$n = 4;
echo(nthTerm($n));
// This code is contributed by Ajit.
?>
java 描述语言
<script>
// Javascript program to find n-th term of
// the series 2, 12, 36, 80, 150, ..
// Returns n-th term of the series
// 2, 12, 36, 80, 150
function nthTerm(n)
{
return (n * n) + (n * n * n);
}
// driver code
let n = 4;
document.write(nthTerm(n));
// This code is contributed by gfgking
</script>
输出:
80
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