यदि गुणोत्तर श्रेढ़ी में \(a_4=80\) और (r=2) है, तो \(a_7\) क्या होगा?
If a geometric progression has \(a_4=80\) and (r=2), what will be \(a_7\)?
Explanation opens after your attempt
C. (640)
Concept
\(a_7=a_4r^3=80\cdot2^3=640\). Use the correct power of the ratio when moving forward from a given term.
Why this answer is correct
The correct answer is C. (640). \(a_7=a_4r^3=80\cdot2^3=640\). Use the correct power of the ratio when moving forward from a given term.
Exam Tip
\(a_7=a_4r^3=80\cdot2^3=640\)। दिए पद से आगे जाने में अनुपात की सही घात लगाएं।
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