K(x)=Dx+E. K(2)=1 dan K(5)=10. nilai K(8) adalah
Matematika
dinsaminah
Pertanyaan
K(x)=Dx+E. K(2)=1 dan K(5)=10. nilai K(8) adalah
1 Jawaban
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1. Jawaban newwiguna
K(x) = Dx + E
K(2) = 2D + E
2D + E = 1
K(5) = 5D + E
5D + E = 10
Eliminasikan
2D + E = 1
5D + E = 10
------------------ -
-3D = -9
D = 3
2D + E = 1
2(3) + E = 1
6 + E = 1
E = 1 - 6
E = -5
rumus fungsi
K(x) = 3x - 5
K(8) = 3(8) - 5 = 24 - 5 = 19