Week 2- Geometric Sequences

This week in math we learned about geometric sequences. A geometric sequence is where every term is multiplied by a constant number.

My geometric series is 13, 65, 325, 1625…

To rind r I need to use the formula $r=\frac{t_n}{t_{n-1}}$

So $latex r=\frac{325}{65} r=5

Now that I know r, I could solve for $t_{10}$ , the formula I need to solve this is $t_{10}=t_1*r^{n-1}$

So $t_{10}=13*5^9$

So $t_{10}$ would equal 25390625.

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