यदि ( \frac{(n+1)!-n!}{(n-1)!}=49 ), तो (n) का मान क्या है?
If ( \frac{(n+1)!-n!}{(n-1)!}=49 ), what is the value of (n)?
Explanation opens after your attempt
C. (7)
Concept
From the simplified form, the expression is \(n^2\), so \(n^2=49\) and (n=7). Simplify the algebraic form first.
Why this answer is correct
The correct answer is C. (7). From the simplified form, the expression is \(n^2\), so \(n^2=49\) and (n=7). Simplify the algebraic form first.
Exam Tip
पिछले रूप से अभिव्यक्ति \(n^2\) है, इसलिए \(n^2=49\) और (n=7)। पहले बीजीय रूप सरल करें।
Login to save your score, XP, coins and progress.
