The domain of the function
f
(
x
)
=
4
x
−
64
\displaystyle {f{{\left({x}\right)}}}=\sqrt{{{4}{x}-{64}}}
f
(
x
)
=
4
x
−
64
is all real numbers in the interval
[
A
,
∞
)
\displaystyle {\left[{A},\infty\right)}
[
A
,
∞
)
where
A
\displaystyle {A}
A
equals
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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