Question

Diketahui rumus fungsi f(x) = 2x +4 , f(-4) =a dan f(b)= 10.
nilai a-b adalah

Answer 1

F(x)= 2x + 4
f(-4) = 2(-4) + 4 = a
       = -8 + 4 = a
a     = -4

f(b) = 2x + 4 = 10
 2x = 10 - 4
 2x = 6
 x = 6/2 = 3

nilai a - b
-4 - 3 = -7