Question

determine o valor A10.2=​

Answer 1

resposta pirata:

A(10, 2) = 10. 9 = 90 ✓

resposta para professor ver:

A(m, p) = m! / (m-p)!

A(10, 2) = 10! / (10-2)!

A(10, 2) = 10! / (8)!

A(10, 2) = 10.9.8! / 8!

A(10, 2) = 10.9

A(10, 2) = 90 ✓