यदि (\frac{(m+2)!}{m!}=90) हो, तो (m) का मान क्या है?
If (\frac{(m+2)!}{m!}=90), what is the value of (m)?
Explanation opens after your attempt
C. (8)
Concept
(\frac{(m+2)!}{m!}=(m+2)(m+1)), so \(10\cdot9=90\) gives (m=8). Identify the product of consecutive numbers.
Why this answer is correct
The correct answer is C. (8). (\frac{(m+2)!}{m!}=(m+2)(m+1)), so \(10\cdot9=90\) gives (m=8). Identify the product of consecutive numbers.
Exam Tip
(\frac{(m+2)!}{m!}=(m+2)(m+1)), इसलिए \(10\cdot9=90\) से (m=8)। लगातार संख्याओं का गुणनफल पहचानें।
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