a. f(2) + g (5)
b.
1/2. g(4) − 2. f(-3)
c.
2.f(3) +3.9(−2) / -2.9(1)
tolong bantu yaa dikumpul hari ini soalnya..
Diberikan suatu fungsi f : x → 6x – 7 dan g(x) = 3 – 5x. Hitung nilai x jika :
Jawaban:
a) -17
b) 79/2
c) 61/4
Penjelasan dengan langkah-langkah:
diketahui
f(x) = 6x-7
g(x) = 3-5x
a) f(2) + g(5)
= [6(2)-7 ] + [ 3-5(5)]
=[ 12-7] + [ 3-25 ]
= 5 – 22
= -17
b) 1/2 g(4) – 2 f(-3)
= 1/2[ 3-5(4) ] – 2 [ 6(-3) – 7 ]
= 1/2 [ 3-20] – 2 [ -17 – 7 ]
= 1/2 ( -17) – 2 (-24)
= -17/2 + 48
= 79/2
c) 2 f (3) + 3 g(-2) / -2 g(1)
= 2[18-7] + 3 [ 3+10] / -2 [ 3-5]
= 2( 11) + 3( 13) / -2 (-2)
= 22+39/4
=61/4