1. Nilaidari5log125+2log20+2log2/5 -3log 81 adalah…. a. 2 b. 1 c. 0 d. -1 e. -2 2. Persamaan bayangan garis 2x-y = 8 jika ditraslasikan oleh T =(-1 2) adalah… a

logaritma
⁵log125 + ²log(4 x 5) + ²log[tex] \frac{2}{5} [/tex] - ³log 81
⁵log125 + ²log4 + ²log5 + ²log2 - ²log5 - ³log 81
⁵log5³ + ²log2² + ²log5 + ²log2 - ²log5 - ³log3⁴
3 x ⁵log5 + 2 x ²log2 + ²log5 + ²log2 - ²log5 - 4 x ³log3
3 +  2 + 1 - 4
2


 
translasi T = (-1, 2)
x' = x + a = x - 1
x = x' + 1

y' = y + b = y + 2
y = y' - 2

masukkin ke persamaan garis
2x - y = 8
2(x' + 1) - (y' - 2) = 8
2x + 2 - y + 2 = 8
2x - y + 4 = 8
2x - y = 4