Answer:
[tex]\boxed{Un = 3(-5)^{n - 2}}[/tex]
Step-by-step explanation:
We know that
a = -0,6 = [tex]-\frac{3}{5}[/tex] and r = [tex]\frac{3}{-0,6}[/tex] = -5
.
So
[tex]Un = ar^{n - 1}[/tex]
[tex]Un = (-\frac{3}{5} )(-5)^{n - 1}[/tex]
[tex]Un = (3)(-5)^{-1}(-5)^{n - 1}[/tex]
[tex]Un = 3(-5)^{n - 2}[/tex]
