Fungsi fx = px + q, jika f(-4) = -26 dan f(3) = 16, maka nilai p+q
Jawaban Terkonfirmasi
Mapel : Matematika
Kelas : 10
Bab : Relasi dan Fungsi
→ f(x) = px + q
→ f(-4) = -26
→ f(3) = 16
Ditanya :
→ Nilai p + q
Jawaban :
→ fungsi f(-4)
px + q = -26
p(-4) + q = -26
-4p + q = -26
q = 4p – 26……. (1)
→ fungsi f(3)
px + q = 16
3p + (4p – 26) = 16
7p = 16 + 26
p = 42/7
p = 6 ✔
q = 4p – 26
q = 4(6) – 26
q = 24 – 26
q = -2 ✔
Jadi,
= p + q
= 6 + (-2)
= 6 – 2
= 4 ✔