Reševanje maturitetnih nalog

n = 1 (slider from 1 to 6, step 1)
a(x) = 8.0 * (1.0 / 2.0)^(x) - 1.0
A: (n, a(n))
b: a(1.0)
c: a(2.0)
d: a(3.0)
e: a(4.0)