tentukan hp dari (log x)² + log x = log 100​

richiezboncakulv – February 14, 2023

tentukan hp dari (log x)² + log x = log 100​

LogAritma

Ingat

ᵃlog a = 1

Misal log x = a

x = 10ᵃ

log x² + log x = log 100

a² + a = log 10²

a² + a = 2 . log 10

a² + a - 2 = 0

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

a = 1, a = -2

log x = 1

x = 10¹

x = 10

log x = -2

x = 10⁻²

x = 1/10²

x = 1/100

HP = {10, 1/100}