Respuesta :
Answer:
a is 0, b is 2
Step-by-step explanation:
Ik its late, but it was pretty ez. Just plug in dem numbers.
a. In the case when r is an odd integer so it should be zero.
b. In the case when r is an even integer so it should be two.
Calculation of the value:
a.. In the case when r is an odd integer
So,
[tex]= (-1)^r + 1[/tex]
= -1 + 1
= 0
b. In the case when r is an even integer
So,
= 1 + 1
= 2
Learn more about an integer here: https://brainly.com/question/18274355