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Mathematics

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1) Find a formula for a sub n for the arithmetic sequence a sub 1 = 7, d = 12.

2) Write the first 5 terms of the geometric sequence a sub 1 = 2, r = 2.

Answer :

Today at 1:44 PM

Answer:

Step-by-step explanation:

nth term = a₁ + (n-1)d = 7 + (n-1)12

:::::

nth term = a₁rⁿ⁻¹ = 2×2ⁿ⁻¹ = 2ⁿ

a₁ = 2

a₂ = 4

a₃ = 8

a₄ = 16

a₅ = 32

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