यदि \(a_1=7\) और \(a_{n+1}=a_n+na_1\) है तो \(a_4\) क्या होगा?
If \(a_1=7\) and \(a_{n+1}=a_n+na_1\), what is \(a_4\)?
Explanation opens after your attempt
C. (49)
Concept
The terms are (7,14,28,49), so \(a_4=49\). Exam tip: \(a_1\) is fixed while (n) changes.
Why this answer is correct
The correct answer is C. (49). The terms are (7,14,28,49), so \(a_4=49\). Exam tip: \(a_1\) is fixed while (n) changes.
Exam Tip
पद (7,14,28,49) हैं इसलिए \(a_4=49\) है। \(a_1\) स्थिर है और (n) बदलता है।
Login to save your score, XP, coins and progress.
