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JEE MATHEMATICS MCQ: PERMUTATIONS

1 Easy

1 of 1

Application +4 | -1

If

x \in {N}

and

\frac{(x+2) !}{(2 x-1) !} \cdot \frac{(2 x+1) !}{(x+3) !}=\frac{72}{7}

, then

x

is equal to

View answer and explanation

Correct option: B

4

Option B (4) is correct because simplifying the given factorial equation leads to a quadratic equation, which has x=4 as a valid solution.

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