यदि \(a_1=100\) और (a_{n+1}=a_n-(n+1)2) है तो \(a_4\) क्या होगा?
If \(a_1=100\) and (a_{n+1}=a_n-(n+1)2), what is \(a_4\)?
Explanation opens after your attempt
C. (71)
Concept
The subtracted squares are (4,9,16), so (100-29=71). Exam tip: subtract squares in order.
Why this answer is correct
The correct answer is C. (71). The subtracted squares are (4,9,16), so (100-29=71). Exam tip: subtract squares in order.
Exam Tip
घटने वाले वर्ग (4,9,16) हैं इसलिए (100-29=71) है। वर्गों को क्रम से घटाएँ।
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