LOGARITMA
log 1 = 0
No. 1
²log (x² - 6x + 10) = ³log (x² - 6x + 10)
x² - 6x + 10 = 1
x² - 6x + 10 - 1 = 0
x² - 6x + 9 = 0
(x - 3)² = 0
x - 3 = 0
x = 3
No. 2
²log (2x² + 6x - 5) = 0
2x² + 6x - 5 = 1
2x² + 6x - 5 - 1 = 0
2x² + 6x - 6 = 0
x² + 3x - 3 = 0
x1,2 = (-b ± √(b² - 4ac))/(2a)
x1,2 = (-3 ± √21)/2
Nilai x yang memenuhi :
(-3 + √21)/2 dan (-3 - √21)/2
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LOGARITMA
log 1 = 0
No. 1
²log (x² - 6x + 10) = ³log (x² - 6x + 10)
x² - 6x + 10 = 1
x² - 6x + 10 - 1 = 0
x² - 6x + 9 = 0
(x - 3)² = 0
x - 3 = 0
x = 3
No. 2
²log (2x² + 6x - 5) = 0
2x² + 6x - 5 = 1
2x² + 6x - 5 - 1 = 0
2x² + 6x - 6 = 0
x² + 3x - 3 = 0
x1,2 = (-b ± √(b² - 4ac))/(2a)
x1,2 = (-3 ± √21)/2
Nilai x yang memenuhi :
(-3 + √21)/2 dan (-3 - √21)/2