Week 2 – Geometric Sequences

A geometric sequence is formed by multiplying each term after the 1st term by a constant, to determine the next term. The constant is the common ratio (r).

3, 6, 12, 24, 48,…

To find the common ratio: $\frac{tn}{tn-1}$ $\frac{6}{3} = 2$

The common ratio of this sequence is 2.

To find any term in a geometric sequence, we use the formula $t_{n}=ar^{n-1}$

For example, $t_{10}=3*2^{9}$

$t_{10}=3*512$ $t_{10}=1536$

M	T	W	T	F	S	S
			1	2	3	4
5	6	7	8	9	10	11
12	13	14	15	16	17	18
19	20	21	22	23	24	25
26	27	28

Week 2 – Geometric Sequences

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