Question

(5n-1)!/(5n-3)!

por favor me ajudem a resolver
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Answer 1

$\mathsf{\dfrac{(5n-1)!}{(5n-3)!}} \\ \mathsf{\dfrac{(5n-1)(5n - 2)\cancel{(5n - 3)!}}{\cancel{(5n-3)!}}} \\ =\boxed{\boxed{ \mathsf{(5n - 1)(5n - 2)}}}$

Answer 2

Olá, tudo bem?

$\dfrac{(5n - 1) \times (5n - 2) \times (5n - 3)!}{(5n - 3)!} = \\ \\ \frac{(5n - 1) \times (5n - 2) \times \cancel {(5n - 3)!} }{\cancel {(5n - 3)!} } = \\ \\ (5n - 1) \times (5n - 2) \times 1 = \\ \\ 25 {n}^{2} - 10n - 5n + 2 = \\ \\ \color{green} \boxed{ \boxed{ {25n}^{2} - 15n + 2 }}$

Espero ter ajudado :-) Bons estudos.