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What is the simplified form of \(\frac{(n+2)!}{(n+1)!}+1\)?

Answer and explanation

Correct answer: \(n+3\)

Since \((n+2)!=(n+2)(n+1)!\), \(\frac{(n+2)!}{(n+1)!}=n+2\). Adding 1 gives \(n+2+1=n+3\). Option \(n+2\) misses the \(+1\) outside the fraction. Exam tip: In factorial fractions, expand the larger factorial up to the smaller factorial and cancel common factors.

Related tags

Factorial NotationFactorial SimplificationPermutations And CombinationsClass 11 MathematicsAlgebraic ExpressionsMathematicsClass 11 Mcq

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