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Find the equation of the tangent line of the function f ( x ) = x at the point (81,9) . First, to find the
Find the equation of the tangent line of the function
f(x) =
x |
at the point
(81,9)
. First, to find the equation of a line, we need two things: a point on the line and the slope of the line. Now, we can find the slope of the line by remembering thatthe derivative of
f(x)
at
81
is the slope of the tangent line at
(81,9)
. From the definition, the derivative of
f(x)
at
81
is
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