Question

Jika diketahui domain fungsi = {bilangan asli kurang dari 5} dan rumus fungsi f(x) = 5 - Xkuadrat,maka range fungsi adalah

Answer 1

Domain = 1, 2, 3, 4
f (x) = 5 - x²

*) x = 1
5 - 1²
= 4

*) x = 2
5 - 2²
= 1

*) x = 3
5 - 3²
= -4

*) x = 4
5 - 4²
-11

range : {4,1,-4,-11}

Answer 2

F(1) = 5 - 1²
     = 5 - 1
     = 4
f(2) = 5 -  2²
     = 5 - 4
     = 1
f(3) = 5 - 3²
     = 5 - 9
     = -4
f (4) = 5 - 4²
       = 5 - 16
       = - 11
range {4,1,-4,-11}