समांतर श्रेणी \(21,27,33,39,\ldots\) में आठवाँ पद क्या होगा?
What is the eighth term in the arithmetic progression \(21,27,33,39,\ldots\)?
Explanation opens after your attempt
C. (63)
Concept
(a=21) and (d=6), so \(a_8=21+7\times6=63\). In exams, use (a+(n-1)d) for the (n)th term.
Why this answer is correct
The correct answer is C. (63). (a=21) and (d=6), so \(a_8=21+7\times6=63\). In exams, use (a+(n-1)d) for the (n)th term.
Exam Tip
(a=21) और (d=6), इसलिए \(a_8=21+7\times6=63\) है। परीक्षा में (n)वें पद के लिए (a+(n-1)d) लगाएँ।
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