Question

(P+5)!/(P+3)! + (P+4)!

Answer 1

$\frac{(p+5)!}{(p+3)!+(p+4)!}=\frac{(p+5)(p+4)(p+3)!}{(p+3)!+(p+4)(p+3)!}=\frac{(p+5)(p+4)}{1+p+4}=\frac{(p+5)(p+4)}{p+5}=p+4$