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Back to Write arithmetic and geometric sequences — Problem 3 · Task Set 36

Exercises: Write Arithmetic and Geometric Sequences Recursively and Explicitly

Work through each section in order. For any sequence, always verify your formula by computing the first term.

Grade 9·21 problems·~28 min·Common Core Math - HS Functions·group·hsf-bf-a-2
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Fluency Practice

1.

A geometric sequence has a1=2a_1 = 2 and r=3r = 3. Using the explicit formula an=a1⋅rn−1a_n = a_1 \cdot r^{n-1}, find a5a_5.