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If \(\frac{(n+1)!}{n!}=8\), what is the value of (n)?

Answer and explanation

Correct answer: 7

Since \((n+1)!=(n+1)\cdot n!\), \(\frac{(n+1)!}{n!}=n+1\). Thus, \(n+1=8\), which gives \(n=7\). Option 8 is a close distractor because it is the value of \(n+1\), not of \(n\). Exam tip: In factorial ratios, first expand the larger factorial in terms of the smaller one.

Related tags

Factorial NotationPermutations And CombinationsClass 11 MathematicsFactorial SimplificationAlgebraic EquationsMathematicsClass 11 Mcq

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