Question

(UF - PR ) calcule o valor de n sabendo se que a³n+1 = c⁴n+2​

Answer 1

A(n+1 , 3) = C(n+2 , 4)

(n+1)n(n-1) = (n+2)(n+1)n(n-1)/4!

1 = (n+2)/24

n+2 = 24

n = 22 ✓