Question

Efetue: a) 11! + 9! / 10!
b)40!-39!/41!

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{\left(\dfrac{11! + 9!}{10!}\right) = \dfrac{11.10.\not9! + \not9!}{10.\not9!} = \dfrac{110 + 1}{10} = \dfrac{111}{10}}$

$\mathsf{\left(\dfrac{40! - 39!}{41!}\right) = \dfrac{40.\not39! - \not39!}{41.40.\not39!} = \dfrac{40 - 1}{1.640} = \dfrac{39}{1.640}}$