Diketahui fungsi f(x)= ax+b, jika f(-4) =13 dan f(3) =-1, maka nilai a+b (pake cara ya!) # cepetan ya..

f(x) = ax + b

→ f(-4)
a(-4) + b = 13
-4a + b = 13....... (2)

→ f(3)
a(3) + b = -1
3a + b = -1........ (1)


⏩Gunakan Metode Eliminasi
_____________
-4a + b = 13
3a + b = -1
................... -
-7a = 14
a = 14/-7
a = -2 ⏩


3a + b = -1
3(-2) + b = -1
-6 + b = -1
b = -1 + 6
b = 5 ✔


Sehingga :
= a + b
= -2 + 5
= 3

f(x) = ax+b
f(-4) = 13
f(3) = -1

kita cari nilai a dlu

f(-4) = -4a+b = 13
f (3) = 3a+b = -1
______________ -
-7a = 14
a = -2
buat cri b, aku pke f(-4) = -4a+b = 13
masukin nilai a nya =
-4(-2)+b = 13
8 + b = 13
b = 5

jadi nilai a+b adalah
-2 + 5 = 3

trima kasih..
jadikan yg trbaik