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Mathematics
Mathematics
Problem
Let
A
=
{
−
2
,
−
1
,
0
,
1
}
A = \{-2,-1,0,1\}
A
=
{
−
2
,
−
1
,
0
,
1
}
and
B
=
{
0
,
1
,
4
}
B = \{0,1,4\}
B
=
{
0
,
1
,
4
}
. A relation
f
f
f
from
A
A
A
to
B
B
B
is defined by
f
=
{
(
x
,
y
)
:
y
=
x
2
,
x
∈
A
}
.
f = \{(x,y) : y = x^2,\; x \in A\}.
f
=
{(
x
,
y
)
:
y
=
x
2
,
x
∈
A
}
.
Decide whether
f
f
f
is a function and state your conclusion with reason.
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