Graph the first six terms of a sequence where a1 = 2 and r = 4

It’s a geometric sequence with the first term (a1) of 2 and each subsequent term is 4 times as big.

2, 8, 32, 128, 512, 2048

As a function:

a(n) = a1*r^(n-1)

See the following graph:

http://www.wolframalpha.com/input/?i=a%28n%29+%3D+…

If the sequence is a arithmetic progression… then from the first term just go adding the r=4…

Then it is so: 2, 6, 10, 14, 18, 22… OK! … to graph put this points in x-axis. OK!

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