Question

Calcule A7,4 + C4,3?

Answer 1

$Resolu\c{c}\~ao\to \left\{\begin{array}{ccc}A_{7,4}+C_{4,3}\\\\ \frac{7!}{(7-4)!} + \frac{4!}{3!*(4-3)!}\\\\ \frac{7!}{3!} + \frac{4!}{3!} = \frac{7*6*5*4*3!}{3!}+ \frac{4*3!}{3!}\\\\7*6*5*4+4 = 840 + 4 = \boxed{844} \end{array}\right$

* = multiplicação.

Espero ter ajudado. :))