Tentukan nilai n dari persamaan berikut 5^2n-3^2n=5^2n-1+3^2n-1 ....
Matematika
upp11
Pertanyaan
Tentukan nilai n dari persamaan berikut
5^2n-3^2n=5^2n-1+3^2n-1 ....
5^2n-3^2n=5^2n-1+3^2n-1 ....
1 Jawaban
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1. Jawaban SadonoSukirno
5^2n - 3^2n = 5^2n-1 + 3^2n-1
5^2n - 5^2n-1 = 3^2n + 3^2n-1
5^2n - 5^2n.5^-1 = 3^2n + 3^2n.3^-1
5^2n(1 - 5^-1) = 3^2n(1 + 3^-1)
5^2n(1 - 1/5) = 3^2n(1 + ⅓)
5^2n(4/5) = 3^2n(4/3)
5^2n = 3^2n(4/3)(5/4)
5^2n = 3^2n (5/3)
5^2n / 3^2n = 5/3
(5/3)^2n = (5/3)
2n = 1
n = ½