Network
A. 102
B. 60
C. 30
D. 15
E. 2
jawaban : E.
f o g (x) = f (g (x))
= f (5x + 4)
= 6x - 3
= 6 (5x + 4) - 3
= 30 x + 24 - 3
f o g (x) = 30x + 21
f o g (a) = 30a + 21
f o g (a) = 81
30 a + 21 = 81
30a = 81 - 21
a = 60/30
a = 2
Baca Juga: Soal UAS Matematika Kelas 8 Semester 2 2022 Beserta Kunci Jawaban, Nilai Auto 100
4. Jika f(x) = 2 - x, g (x) = x² + 1 dan h (x) = 3x, maka (hogof) (3) = ...
A. -80
B. -6
C. 6
D.80
E. 81
jawaban : C
pembahasan :
ditanya :
hogof (x) =...?
hog (x) = h (g (x) )
= h (x² + 1)
= 3x
= 3 (x² + 1)
hog (x) = 3x² + 3
hogof ( x)
hog (f (x))
hog (2 - x)
= 3x² + 3
