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23-04-2021
Mathematics

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Find the 7th term of the arithmetic sequence 3, 15, 75, ...

Respuesta :

unicorn3125 unicorn3125

24-04-2021

Answer:

a₇ = 46 875

Step-by-step explanation:

15:3 = 5 and 75:15 = 5

so this is a geomertic sequence with common ratio of 5

a₁ = 3, r = 5

aₙ = a₁ rⁿ⁻¹

a₇ = 3(5)⁶ = 3(15 625) = 46 875

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