Question

Halla n(A) +n(B) si se tiene:
A = {x/x ∈Z; 2< x <9}

B = {x/x ∈Z; 3< x <8}

Seleccione una:
a. 16
b. 14
c. 12
d. 9
e. 10

Answer 1

Explicación paso a paso:

A = {x/x ∈Z; 2< x <9}

A= {3, 4, 5, 6, 7, 8}

n(A) = 6

B = {x/x ∈Z; 3< x <8}

B= {4, 5, 6, 7}

n(B) = 4

n(A) + n(B)

6 + 4 = 10