Tolong bantu jawab yaa nnti dksih jawaban terbaik banget deh oke Terimakasih 4. Diketahui f (x) = ax + 2b, f (1) = -1 dan f (2) = -10 nilai f (6) =... a. -22 b.

Dik :
f(x) = ax + 2b
f(1) = -1
f(2) = -10

Dit :
f(6) .. ?

f(1) = a + 2b = -1
f(2) = 2a + 2b = -10
---------------------------- (-)
-a = 9
a = -9

a + 2b = -1
-9 + 2b = -1
2b = -1 + 9
2b = 8
b = 4

f(x) = ax + 2b
f(6) = 6a + 2b
f(6) = 6(-9) + 2(4)
f(6) = -54 + 8
f(6) = -46