Write an explicit formula for An, the nth term of the sequence 75, -15, 3, ....

DzITC asked Jan 10, 2022

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DzITC asked Jan 10, 2022

by DzITC

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25 votes

Answer:

aₙ = 75 * (-1/5)ⁿ⁻¹

Explanation:

75, -15, 3, ..

75, 75*(-0.2), 75*(-0.2)*(-0.2)

aₙ = a₁ * rⁿ⁻¹ a₁ = 75 r = - 1/5 (-0.2)

Klijakub answered Jan 16, 2022

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