What is the tangent of f(x)=9x-9sqrt(x) ?

The tangent of f(x)=9x-9sqrt(x) is y=(9-9/(2sqrt(a_{0))})x-9sqrt(a_{0)}+(9sqrt(a_{0)})/2

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tangent of f(x)=9x-9sqrt(x)

tangent of

f (x) = 9 x - 9 x

y = (9 - \frac{9}{2 a _{0}}) x - 9 a_{0} + \frac{9 a _{0}}{2}

Solution steps

Compute the tangent line to the general point

x = a_{0}

Find the tangent point:

(a_{0}, 9 a_{0} - 9 a_{0})

Find the slope of

f (x) = 9 x - 9 x : \frac{df ( x )}{d x} = 9 - \frac{9}{2 x}

EN : T i tl e G e n er a l Eq u a t i o n Sl o p e A t P o in t 2 Eq : m = 9 - \frac{9}{2 a _{0}}

Find the line with slope m=

9 - \frac{9}{2 a _{0}}

and passing through

(a_{0}, 9 a_{0} - 9 a_{0}) : y = (9 - \frac{9}{2 a _{0}}) x - 9 a_{0} + \frac{9 a _{0}}{2}

y = (9 - \frac{9}{2 a _{0}}) x - 9 a_{0} + \frac{9 a _{0}}{2}

What is the tangent of f(x)=9x-9sqrt(x) ?
The tangent of f(x)=9x-9sqrt(x) is y=(9-9/(2sqrt(a_{0))})x-9sqrt(a_{0)}+(9sqrt(a_{0)})/2