Question

Băieti si fete am nevoie de ex 2 si 3
Mare nevoie
Ajutatima va rog....

Answer 1

a)

3! = 1·2·3

5! = 1·2·3·4·5

8! = 1·2·3·4·5·6·7·8

b)

$\it \dfrac{10!}{6!\cdot2!} = \dfrac{6!\cdot7\cdot8\cdot9\cdot10}{6!\cdot1\cdot2} = 7\cdot8\cdot9\cdot5 =63\cdot40 = 2520$