Answer:
If
and
, then ![|5x-2y|-|3x| = 10](https://tex.z-dn.net/?f=%7C5x-2y%7C-%7C3x%7C%20%3D%2010)
Step-by-step explanation:
This is a problem that utilizes both substitution and the order of operations.
![|5x-2y|-|3x| = \\|-15-(2)(2)|-|(3)(-3)| =\\ |-15-4|-|(3)(-3)| =\\|-19|-|(3)(-3)| =\\19-|(3)(-3)| =\\19-|-9| =\\19-9 =\\10](https://tex.z-dn.net/?f=%7C5x-2y%7C-%7C3x%7C%20%3D%20%5C%5C%7C-15-%282%29%282%29%7C-%7C%283%29%28-3%29%7C%20%3D%5C%5C%20%7C-15-4%7C-%7C%283%29%28-3%29%7C%20%3D%5C%5C%7C-19%7C-%7C%283%29%28-3%29%7C%20%3D%5C%5C19-%7C%283%29%28-3%29%7C%20%3D%5C%5C19-%7C-9%7C%20%3D%5C%5C19-9%20%3D%5C%5C10)
Explanation
We must the tangent line at x = 3 of the function:
![f(x)=(\ln x)^3.](https://tex.z-dn.net/?f=f%28x%29%3D%28%5Cln%20x%29%5E3.)
The tangent line is given by:
![y=m*(x-h)+k.](https://tex.z-dn.net/?f=y%3Dm%2A%28x-h%29%2Bk.)
Where:
• m is the slope of the tangent line of f(x) at x = h,
,
• k = f(h) is the value of the function at x = h.
In this case, we have h = 3.
1) First, we compute the derivative of f(x):
![f^{\prime}(x)=\frac{d}{dx}((\ln x)^3)=3*(\ln x)^2*\frac{d}{dx}(\ln x)=3*(\ln x)^2*\frac{1}{x}=\frac{3(\ln x)^2}{x}.](https://tex.z-dn.net/?f=f%5E%7B%5Cprime%7D%28x%29%3D%5Cfrac%7Bd%7D%7Bdx%7D%28%28%5Cln%20x%29%5E3%29%3D3%2A%28%5Cln%20x%29%5E2%2A%5Cfrac%7Bd%7D%7Bdx%7D%28%5Cln%20x%29%3D3%2A%28%5Cln%20x%29%5E2%2A%5Cfrac%7B1%7D%7Bx%7D%3D%5Cfrac%7B3%28%5Cln%20x%29%5E2%7D%7Bx%7D.)
2) By evaluating the result of f'(x) at x = h = 3, we get:
![m=f^{\prime}(3)=\frac{3}{3}*(\ln3)^2=(\ln3)^2.](https://tex.z-dn.net/?f=m%3Df%5E%7B%5Cprime%7D%283%29%3D%5Cfrac%7B3%7D%7B3%7D%2A%28%5Cln3%29%5E2%3D%28%5Cln3%29%5E2.)
3) The value of k is:
![k=f(3)=(\ln3)^3](https://tex.z-dn.net/?f=k%3Df%283%29%3D%28%5Cln3%29%5E3)
4) Replacing the values of m, h and k in the general equation of the tangent line, we get:
![y=(\ln3)^2*(x-3)+(\ln3)^3.](https://tex.z-dn.net/?f=y%3D%28%5Cln3%29%5E2%2A%28x-3%29%2B%28%5Cln3%29%5E3.)
Plotting the function f(x) and the tangent line we verify that our result is correct:
Answer
The equation of the tangent line to f(x) and x = 3 is:
Answer:12533
Step-by-step explanation:
Answer:
2800000
Step-by-step explanation:
10^6 means 1000000
2.8 x 1000000 = 2800000