A and B are sets of real numbers defined as follows. A= {z│z > 4}B= {z│z ≤ 9}Write A U B and A ∩ B using interval notation. If the set is empty, write Ø

Step-by-step explanation:

From the question we are told that

A= {z│z > 4}

B= {z│z ≤ 9}

Generally A&B are assumed to be really integers

therefore

A={5,6,7,8,.....}={z│z > 4}

B=(9,8,7,6.....)={z│z ≤ 9}

a)For

Mathematically the is given as

=

=(5,6,7,8,9)

Therefore the intercept  is Given as

b) for

Mathematically the is given as

=

=

Therefore the union i given as

=

step-by-step explanation: