Question

F(x)=x2 + 2x daerah asalnya -2,-1,0,1 .daerah hasilnya

Answer 1

F(x)=x^2+2x
substitusi nilai x ke f(x)
x=-2 f(-2)=-2^2+2(-2)=0
x=-1 f(-1)=-1^2+2(-1)=-1
x=0 f(0)=0^2+2(0)=0
x=1 f(1)=1^2+2(1)=3

Answer 2

F (x) = x2 + 2x -> -2, -1, 0, 1
. 2 + 2(-2)
= 2 + -4
= ( -2, -2)
. 2 + 2(-1)
= 2 + - 2
= 0
= ( - 1, 0 )
. 2 + 2(0)
= 2 + 0
= 2
= ( 0, 2 )
.2 + 2(1)
= 2 + 2
= 4
= ( 1, 4)
jadi range atau nilai hasilnya = -2, 0, 2, 4