Let
f
(
x
)
=
{
6
x
−
4
if
x
≤
6
−
2
x
+
b
if
x
>
6
\displaystyle {f{{\left({x}\right)}}}={\left\lbrace\begin{array}{ccc} {6}{x}-{4}&\text{if}&{x}\leq{6}\\-{2}{x}+{b}&\text{if}&{x}>{6}\end{array}\right.}
f
(
x
)
=
{
6
x
−
4
−
2
x
+
b
if
if
x
≤
6
x
>
6
If
f
(
x
)
\displaystyle {f{{\left({x}\right)}}}
f
(
x
)
is a function which is continuous everywhere, then we must have
b
=
\displaystyle {b}=
b
=
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