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f(x) = 3 (2) - 4 = 6 - 4 = 2
2. f(x) = 12 - 3x
f(0) = 12 - 3(0)
f(0) = 12
kodomain = 12, 15, 18, 21 , 24
3. jawabanmu betul
4 . f(x) = px+q
f(2) = p(2)+q = 1
f(2) = 2p+q = 1
f(-2) = p(-2)+q = 13
f(-2) = -2p+q = 13
(2p+q=1) - ( (-2p)+q=13) { q-q = 0, jadi tidak usah ditulis 0}
4p=-12 {metode eliminasi}
p= -3
{subsitusi ke 2p+q=1}
2(-3)+q=1
-6+q=1
q=1+6 {pndah ruas , juga pindah tanda}
q=7
RUMUS FUNGSINYA = f(x) -3x+7 (D)