Fungsi fx = px + q, jika f(-4) = -26 dan f(3) = 16, maka nilai p+q

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 ✔