Respuesta :

9514 1404 393

Answer:

  10

Step-by-step explanation:

In roster form, the set is ...

  M = {-9, -7, -5, -3, -1, 1, 3, 5, 7, 9} . . . . 10 elements

  n(M) = 10 . . . . . cardinality of set M