Question

Jawab semua.... no.1-6

Answer 1

No. 1
(² log x)² - (² log x) - 2 = 0
² log x = a

a² - a - 2 = 0
(a - 2)(a + 1) = 0
a = 2    a = -1

pembuktian
² log x = 2
       x = 2²
       x = 4

² log x = -1
       x = 2^-1
       x = 1/2

Hp { 1/2 ; 4}

no. 6

x + 2 = 3x - 2
-3x + x = -2 - 2
-2x = -4
   x = 2

pembuktian

x + 3 = 2 + 3 = 5 (masuk syarat logaritma)
x + 2 = 2 + 2 = 4 (masuk syarat log)
3x - 2 = 3(2) - 2 = 6 - 2 = 4 (masuk syarat log)
jadi Hp {2}