Grade 12 Mathematics: Geometric Patterns

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CCSS.HSF.BF.A.2

Write the explicit formula for the geometric sequence a = 7, r = -4

• T_n = 7-4^n-1

• T_n = 7(-4)^n-1

• T_n = 7· -4^n-1

• T_n = -4(7)^n-1

Answer explanation

You need to use the general or explicit formula for a geometric sequence; T_n = T₁ · r^n -1. Plug in the values for T₁ and r, to get T_n = 7 · (-4)^n -1.

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CCSS.HSF.BF.A.2

Which geometric sequence does not include the term 100?

• 2530; 1280; 640; …

•       337.5; 225; 150; …

• T₁ = 25, T_n = 2T_{n – 1}

• T_n = 4 · 5ⁿ

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CCSS.HSF.BF.A.2

Tags

CCSS.HSF.BF.A.2

Answer explanation

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CCSS.HSF.BF.A.2

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CCSS.HSF.BF.A.2

Find the missing term of the geometric sequence 10, ___, 40,...

Answer explanation

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CCSS.HSF.BF.A.2

Answer explanation

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CCSS.HSF.BF.A.2