Dik: f (x) = 3x + 2 g(x) = 2-x dit a). (Fog) (x) b). (Gof) (x) c). (Fog) (3) d). (Gof) (-3)
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Pertanyaan
Dik: f (x) = 3x + 2 g(x) = 2-x dit a). (Fog) (x) b). (Gof) (x) c). (Fog) (3) d). (Gof) (-3)
1 Jawaban
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1. Jawaban hananda16052002
a. (f o g) (x) = f (g(x))
= f (2 - x)
= 3 (2 - x) + 2 = 6 - 3x + 2 = -3x + 8
b. (g o f) (x) = g (f(x))
= g ( 3x + 2)
= 2 - (3x + 2)
= 2- 3x - 2 = -3x
c. (f o g) (3) = -3 (3) + 8 = -9 + 8 = -1
d. (g o f) (-3) = -3 (-3) = 9