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Varvara68 [4.7K]

2 years ago

10

Se sabe que el septimo termino de una progresion geometrica es 3 ya la razon es 1/2. Se desea saber cual es el valor del primer

termino.

1 answer:

AfilCa [17]2 years ago

7 0

Respuesta:

192

Explicación paso a paso:

aₙ = a₁*rⁿ⁻¹

Hallando termino 1

a₇ = 3

r = 1/2

a₁ = ?

a₁ = aₙ / rⁿ⁻¹

a₁ = 3 / (1/2)⁷⁻¹

a₁ = 192

Verificación;

n aₙ

1 192

2 96

3 48

4 24

5 12

6 6

7 3 ✔

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