Answer/Step-by-step explanation:
✔️when x = 0:

Plug in the value of x

(negative exponent)
(whatever number that is raised to the power of 0 = 1)
a = 1
✔️when x = 2:

Plug in the value of x

(negative exponent)
✔️when x = 4:

Plug in the value of x

(negative exponent)