a. bentuk fungsi f(x) *yang ini udah ketemu, jawabannya a = 1, b = 0 bentuk fungsinya f(x) = x
b. bentuk paling sederhana dari f(x - 1)
arsetpopeye
F(x) = ax + b f(1) = a + b = 2 f(2) = 2a + b = 1 --------------------- - -a = 1 => a = -1 a + b = 2 => -1 + b = 2 => b = 3 jadi f(x) = ax + b => f(x) = -x + 3
f(1) = a + b = 2
f(2) = 2a + b = 1
--------------------- -
-a = 1 => a = -1
a + b = 2
=> -1 + b = 2
=> b = 3
jadi f(x) = ax + b => f(x) = -x + 3
b. f(x - 1) = -(x - 1) + 3 = - x + 1 + 3 = -x + 4