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Mathematics
Mathematics
Problem
6. Let
A
=
{
1
,
2
,
3
}
,
B
=
{
4
,
5
,
6
,
7
}
\mathrm{A}=\{1,2,3\}, \mathrm{B}=\{4,5,6,7\}
A
=
{
1
,
2
,
3
}
,
B
=
{
4
,
5
,
6
,
7
}
and let
f
=
{
(
1
,
4
)
,
(
2
,
5
)
,
(
3
,
6
)
}
f=\{(1,4),(2,5),(3,6)\}
f
=
{(
1
,
4
)
,
(
2
,
5
)
,
(
3
,
6
)}
be a function from A to B . Show that
f
f
f
is one-one.
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