Question

Jika f(x-5) = x²+2 , maka f(x) =
jika f(2x) = 3x²+2 , maka f(x) =
jika f(3x) = 2x+1 , maka f(6) =
jika f(x+5) = x²+2x+1 , maka f(3) =

mohon bantu yaa temaann :(
semampu kalian aja, tapi kalo bisa semua terjawab.. tolong yaa, thank

Answer 1

F(x-5) = x^2 - 10x + 25 +10x - 23
f(x) = x^2 +10x - 23

f(2x) = 3x^2 + 2
f(x) = (3/4)x^2 + 2

f(3x) = 2x + 1
f(6) = 2.2 + 1 = 5

f(x+5) = x^2 + 10x + 25 - 8x - 24
f(x) = x^2 - 8x - 24
f(3) = 9 - 24 - 24 = -39

Answer 2

F (3x)= 2x + 1 >>> f (6 ) = ?
3x = 6 >> lihat yg d dalam f
maka x = 6 / 3 =2
maka f (6 ) = 2x2 + 1 = 5

f(x+5) = x²+2x+1 , maka f(3) =?

x+5 = 3 >>> x = 3 -  5 = -2
>>>
f(3) = -2^2 + 2x2 +  1 = 9