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Verified answer
Bab EksponensialMatematika SMP Kelas IX
9^x - 4 . 3^x + 6 - (4/3^x) + 1/9^x = 0
3^x = a
9^x = (3²)^x = (3^x)² = a²
a² - 4a + 6 - 4/a + 1/a² = 0
●● dikalikan a²●●
a^4 - 4 a^3 + 6a² - 4a + 1 = 0
(a - 1)^4 = 0
a - 1 = 0
a = 1
3^x = 1
3^x = 3^0
x = 0
Jumlah semua nilai x = 0