यदि \(a_1=8\) और (a_{n+1}=a_n+(2n-1)) है तो \(a_4\) क्या होगा?
If \(a_1=8\) and (a_{n+1}=a_n+(2n-1)), what is \(a_4\)?
Explanation opens after your attempt
C. (17)
Concept
The terms are (8,9,12,17), so \(a_4=17\). Exam tip: (2n-1) adds odd numbers.
Why this answer is correct
The correct answer is C. (17). The terms are (8,9,12,17), so \(a_4=17\). Exam tip: (2n-1) adds odd numbers.
Exam Tip
पद (8,9,12,17) हैं इसलिए \(a_4=17\) है। (2n-1) से विषम संख्याएँ जुड़ती हैं।
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