यदि \(a_1=150\) और \(a_{n+1}=a_n-n^3\) है तो \(a_5\) क्या होगा?
If \(a_1=150\) and \(a_{n+1}=a_n-n^3\), what is \(a_5\)?
Explanation opens after your attempt
Correct Answer
B. (50)
Concept
The subtracted cubes are (1,8,27,64), so \(a_5=50\). Exam tip: find the sum of cubes first.
Why this answer is correct
The correct answer is B. (50). The subtracted cubes are (1,8,27,64), so \(a_5=50\). Exam tip: find the sum of cubes first.
Exam Tip
घटने वाले घन (1,8,27,64) हैं इसलिए \(a_5=50\) है। घनों का योग पहले निकालें।
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