Question

Fungsi h dirumuskan oleh h(x) = ax + b dengan h(-2) = -10 dan h(3) = 5 maka -ab =


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Answer 1

-2a + b  = -10
 3a  + b =    5  -
 -5a  = -15
    a  = 3
 
-2a + b = -10 
-6 + b = -10
       b = -4

-ab = (-3) x (-4)
      = 12

Answer 2

H(x) = ax + b
h(-2)= a(-2)x + b = -10
h(-2)= -2ax + b = -10

h(3) = a(3) + b = 5
h(3) = 3a + b = 5

h(-2)= -2a + b = -10
h(3) = 3a + b = 5
___________________-
-5a = -15
a = -15/-5
a = 3

3a + b = 5
3(3) + b = 5
9 + b = 5
b = 5 - 9
b = -4

ab = 3.-4
= -12

jadi ab = -12