Electronic Society C language level 1 30, calculation of last term of arithmetic sequence

Electronics Association C Language 1 level  30 、 Calculation of the last term of the arithmetic sequence

OpenJudge - 7654: Calculation of the last term of the arithmetic sequence

OpenJudge - 18: Calculation of the last term of the arithmetic sequence

Mathematical knowledge points column of higher vocational college entrance examination ： The general term formula of arithmetic sequence

Mathematical knowledge points column of higher vocational college entrance examination ： The general term formula of arithmetic sequence _ Bili, Bili _bilibili

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C++ Code ： Method 1

/*
 Electronics Association  C Language  1 level   30 、  Calculation of the last term of the arithmetic sequence 
http://noi.openjudge.cn/math/7654/
http://noi.openjudge.cn/ch0103/18/

 Give the first two terms of an arithmetic sequence  a1,a2, Please  n  What is the item? .
 Input 
 a line , Contains three integers  a1,a2,n.-100 <= a1,a2 <= 100,0 < n <= 1000.
 Output 
 An integer , That is to say  n  Item value .
 The sample input :1 4 100
 Sample output :298 

3 6 9 12 15

 Mathematical knowledge points column of higher vocational college entrance examination ： The general term formula of arithmetic sequence 
https://www.bilibili.com/video/BV13U4y1p7ec
*/
#include<iostream>
using namespace std;
int main() 
{
	int a1,a2,an,n;
	
	cin>>a1>>a2>>n;
	
	// tolerance d=a2-a1=a3-a2=a4-a3=an-an-1 
	
	an=a1+(n-1)*(a2-a1);// General term formula of arithmetic sequence 
	
	cout<<an;
	
	return 0;
} 

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C＋+ Code ： Method 2

/*
 Electronics Association  C Language  1 level   30 、  Calculation of the last term of the arithmetic sequence   Method 2  
http://noi.openjudge.cn/math/7654/
http://noi.openjudge.cn/ch0103/18/

1047： Judge whether it can be 3,5,7 to be divisible by --- good 
https://blog.csdn.net/weixin_43877387/article/details/118456563 
*/ 
#include<iostream>
using namespace std;
int main()
{
    
	int a1,a2,n,d;
    
	cin>>a1>>a2>>n;
    
	d=a2-a1;
    
	cout<<a1+(n-1)*d;
    
	return 0;
}

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python3 Code ：

a1,a2,n=map(int,input().split())

d=a2-a1

an=a1+(n-1)*d

print(an)

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Electronic Society junior programming grade test

https://blog.csdn.net/dllglvzhenfeng/category_11735875.html

Electronics Association C Language 1 level  30 、 Calculation of the last term of the arithmetic sequence

OpenJudge - 7654: Calculation of the last term of the arithmetic sequence

OpenJudge - 18: Calculation of the last term of the arithmetic sequence

Mathematical knowledge points column of higher vocational college entrance examination ： The general term formula of arithmetic sequence

Mathematical knowledge points column of higher vocational college entrance examination ： The general term formula of arithmetic sequence _ Bili, Bili _bilibili

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