(11C) n-th term of a Geometric Sequence

[Gamo]

Dieter Thank You

I like the shorter solution for even or odd routine.

Your version of the step through a geometric progression is good but my manual version is easier.

Steps:
(r) ENTER ENTER ENTER
(a)
x (multiply) keep repeat this x as desire

Example:
1, −3, 9, −27, 81, −243, ...

-3 ENTER ENTER ENTER
1
X (repeat multiplication)

Gamo