यदि \(a_n=7\cdot2^{n-1}\) है, तो \(a_4+a_5\) का मान क्या होगा?
If \(a_n=7\cdot2^{n-1}\), what is the value of \(a_4+a_5\)?
Explanation opens after your attempt
D. (168)
Concept
\(a_4=56\) and \(a_5=112\), so the sum is (168). Find both terms separately and then add.
Why this answer is correct
The correct answer is D. (168). \(a_4=56\) and \(a_5=112\), so the sum is (168). Find both terms separately and then add.
Exam Tip
\(a_4=56\) और \(a_5=112\), इसलिए योग (168) है। दोनों पद अलग निकालकर जोड़ें।
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