यदि \(a_1=1\) और \(a_{n+1}=a_n+n^2+1\) है तो \(a_4\) क्या होगा?
If \(a_1=1\) and \(a_{n+1}=a_n+n^2+1\), what is \(a_4\)?
Explanation opens after your attempt
C. (18)
Concept
The terms are (1,3,8,18), so \(a_4=18\). Exam tip: the value of \(n^2+1\) changes at each step.
Why this answer is correct
The correct answer is C. (18). The terms are (1,3,8,18), so \(a_4=18\). Exam tip: the value of \(n^2+1\) changes at each step.
Exam Tip
पद (1,3,8,18) हैं इसलिए \(a_4=18\) है। \(n^2+1\) का मान हर चरण में बदलता है।
Login to save your score, XP, coins and progress.
