यदि \(a_n=a_{n-1}+4n-2\) और \(a_5=70\) है, तो \(a_2\) का मान क्या होगा?
If \(a_n=a_{n-1}+4n-2\) and \(a_5=70\), what is the value of \(a_2\)?
Explanation opens after your attempt
D. अट्ठाईस(28)
Concept
\(a_5=a_2+10+14+18\), so \(a_2=28\). In exams, subtract the later additions to find a middle term.
Why this answer is correct
The correct answer is D. अट्ठाईस / (28). \(a_5=a_2+10+14+18\), so \(a_2=28\). In exams, subtract the later additions to find a middle term.
Exam Tip
\(a_5=a_2+10+14+18\), इसलिए \(a_2=28\) है। परीक्षा में बीच के पद के लिए आगे की जोड़ घटाएँ।
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