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Rumus suku ke-n pada barisan geometri 25 , 125 , 625 , . . . adalah …

Rani Maharani

Jawaban

Rumus suku ke-n pada barisan geometri adalah:

$$a_n = a_1 \times r^{n-1}$$

Dalam hal ini, a₁ = 25 dan r = 5 karena setiap suku diperoleh dengan mengalikan suku sebelumnya dengan 5.

Sehingga untuk mencari suku ke-n, kita tinggal substitusi nilai a₁ dan r ke dalam rumus:

$$a_n = 25 \times 5^{n-1}$$

Jadi, rumus suku ke-n pada barisan geometri 25 , 125 , 625 , . . . adalah:

$$a_n = 25 \times 5^{n-1}$$

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