किसी अनुक्रम में \(F_1=90\) और (F_n=F_{n-1}-n(n+1)) है। \(F_4\) का मान क्या होगा?

In a sequence, \(F_1=90\) and (F_n=F_{n-1}-n(n+1)). What is the value of \(F_4\)?

Author: Muft Shiksha Editorial Team Published:
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Correct Answer

A. बावन(52)

Step 1

Concept

\(F_4=90-6-12-20=52\). In exams, subtract (n(n+1)), do not add it.

Step 2

Why this answer is correct

The correct answer is A. बावन / (52). \(F_4=90-6-12-20=52\). In exams, subtract (n(n+1)), do not add it.

Step 3

Exam Tip

\(F_4=90-6-12-20=52\) है। परीक्षा में (n(n+1)) को घटाएँ, जोड़ें नहीं।

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किसी अनुक्रम में \(F_1=90\) और (F_n=F_{n-1}-n(n+1)) है। \(F_4\) का मान क्या होगा? / In a sequence, \(F_1=90\) and (F_n=F_{n-1}-n(n+1)). What is the value of \(F_4\)?

Correct Answer: A. बावन / (52). Explanation: \(F_4=90-6-12-20=52\) है। परीक्षा में (n(n+1)) को घटाएँ, जोड़ें नहीं। / \(F_4=90-6-12-20=52\). In exams, subtract (n(n+1)), do not add it.

Which concept should I revise for this Mathematics MCQ?

\(F_4=90-6-12-20=52\). In exams, subtract (n(n+1)), do not add it.

What exam hint can help solve this Mathematics question?

\(F_4=90-6-12-20=52\) है। परीक्षा में (n(n+1)) को घटाएँ, जोड़ें नहीं।