Question

Tolong dengan cara yang lengkap

Answer 1

Misal : ⁴log x = a

2(⁴log x)² - 6(⁴log x/2) + 1 = 0
2a² - 6a + 3 + 1 = 0
2a² - 6a + 4 = 0
a² - 3a + 2 = 0
(a-2)(a-1) = 0

a = 2 atau a = 1

⁴log x = 2
x1 = 4²
x1 = 16

⁴log x = 1
x2 = 4¹
x2 = 4

x1 + x2 = 16 + 4 = 20