10 = -2k
-5 = k
5. Suatu fungsi f(x) = ax + b, Jika f (3)= 8 dan f(-2) = 7. Maka a + b =...
pembahasan :
f(x) = ax + b
f(3) = 3a + b = 8
f(-2) = -2a + b = 7
__________ -
5a = 1
a = 1/5
3a + b = 8
3(1/5) + b = 8
3/5 + b = 8 -
b = 8-3/5
b = 37/5
a + b?
jawab :
1/5 + 37/5 = 38/5
Baca Juga: Soal Latihan Matematika Kelas 9 Dilatasi, Halaman 179, 180, 181, 182 Bab 3 Transformasi
6. Perhatikan relasi berikut: