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Problem
Problem
Let
f
(
x
)
=
{
6
,
x
≤
1
7
−
x
,
x
>
1
f(x) = \begin{cases} 6, & x \le 1 \\ 7-x, & x > 1 \end{cases}
f
(
x
)
=
{
6
,
7
−
x
,
x
≤
1
x
>
1
, then for
f
(
x
)
f(x)
f
(
x
)
at
x
=
1
x=1
x
=
1
discuss maxima and minima.
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