Question

Diketahui f(x) = px + q, f(-1) = -5, dan f(4) = 5, nilai f(-6) adalah...
a. -15
b. -9
c. 7
d. 10

Answer 1

F(x) = px+q
f(-1) = -p+q = -5
f(4) = 4p+q = 5 _
         -5p = -10
           p = 2
-2+q = -5
q = -5+2
q = -3

f(x) = 2x-3
f(-6) = 2(-6)-3 = -12-3 = -15 (A)

semoga membantu :)

Answer 2

eliminasikan persamaan 1 dan persamaan 2
-p + q = -5
4p+ q = 5  -