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kumpel [21]
3 years ago
8

Find the equation of a tangent line at the point on a curve f(x) when x=ef(x)=xln(x)+x

Mathematics
1 answer:
alex41 [277]3 years ago
7 0
\bf f(x)=xln(x)+x\implies \cfrac{dy}{dx}=\stackrel{product~rule}{\left[1\cdot ln(x)+x\cdot \cfrac{1}{x}\right]}+1
\\\\\\
\left. \cfrac{dy}{dx}=ln(x)+2 \right|_{x=e} \implies 1+2\implies 3
\\\\\\
\textit{when x=e, what is \underline{y}?}\qquad f(e)=eln(e)+e\implies f(e)=2e
\\\\\\
(e~~,~~2e)\qquad\qquad \stackrel{\textit{point-slope form}}{y-{{ y_1}}={{ m}}(x-{{ x_1}})}\implies y-2e=3(x-e)
\\\\\\
y-2e=3x-3e\implies y=3x-e
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dsp73

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Step-by-step explanation:

a=13 b=13 c=10

Perimeter of =a+b+c

perimeter of =13+13+10

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Keith_Richards [23]

Answer:

The minimum guaranteed mileage is  x = 71489.55

Step-by-step explanation:

From the question we are told that

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Generally for the probability to be 4% the minimum guaranteed mileage is evaluated as

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\frac{X -\mu}{\sigma }  =  Z (The  \ standardized \  value\  of  \ X )

     P( X  \ge x ) =1-  P( Z

=>  P( X  \ge x ) = P( Z

=>    z = \frac{ x -  67900 }{ 2050}

From the z table, the critical value corresponding to 0.96 to the left of the curve is  

         z = 1.751

So

        1.751 = \frac{ x -  67900 }{ 2050}

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