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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.
Mathematics
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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