यदि \(f_1=2\) और \(f_n=f_{n-1}+2n\) है, तो पहले चार पदों का योग क्या होगा?
If \(f_1=2\) and \(f_n=f_{n-1}+2n\), what is the sum of the first four terms?
Explanation opens after your attempt
D. चालीस(40)
Concept
The first four terms are (2), (6), (12), and (20), and their sum is (40). In exams, add all terms when the sum is asked.
Why this answer is correct
The correct answer is D. चालीस / (40). The first four terms are (2), (6), (12), and (20), and their sum is (40). In exams, add all terms when the sum is asked.
Exam Tip
पहले चार पद (2), (6), (12), (20) हैं और योग (40) है। परीक्षा में योग पूछने पर सभी पद जोड़ें।
Login to save your score, XP, coins and progress.
