1. is always even while is always odd.

2. series, 1, 2, 6, 24, 120, 720, … Be comfortable withholding and subtracting 1 from it too, for example 2, 3, 7, 25, 121, 721.

3. APGP Series.

4. series, 2, 4, 8, 16, 32, 64, …

5. series, 3, 9, 27, 81, 243, …

6 Triangular Numbers, 1, 3, 6, 10, …

### Like this:

Like Loading...

*Related*

[…] into the GC, how to show increasing/ decreasing sequence. For conjecture, students may find this post helpful. How it can be hard, you can’t do your favourite MI if you can’t even do a […]