The function
f
(
x
)
=
(
7
x
−
6
)
e
−
6
x
\displaystyle {f{{\left({x}\right)}}}={\left({7}{x}-{6}\right)}{e}^{{-{6}{x}}}
f
(
x
)
=
(
7
x
−
6
)
e
−
6
x
has one critical number. Find it.
x =
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\displaystyle
Enter your answer as a number (like 5, -3, 2.2172) or as a calculation (like 5/3, 2^3, 5+4)
Enter DNE for Does Not Exist, oo for Infinity