Answer:
a) ![\large F(x,y)=(-\frac{y}{x^2+y^2},\frac{x}{x^2+y^2})](https://tex.z-dn.net/?f=%5Clarge%20F%28x%2Cy%29%3D%28-%5Cfrac%7By%7D%7Bx%5E2%2By%5E2%7D%2C%5Cfrac%7Bx%7D%7Bx%5E2%2By%5E2%7D%29)
b) ![\large \mathbb{R}^2-\{(0,0)\}](https://tex.z-dn.net/?f=%5Clarge%20%5Cmathbb%7BR%7D%5E2-%5C%7B%280%2C0%29%5C%7D)
c) the points of the form (x, -x) for x≠0
Step-by-step explanation:
a)
If φ(x, y) = arctan (y/x), the vector field F = ∇φ would be
On one hand we have,
On the other hand,
So
b)
The domain of definition of F is
i.e., all the plane X-Y except the (0,0)
c)
Here we want to find all the points such that
where k is a real number other than 0.
But this means
So, all the points in the line y = -x except (0,0) are parallel to the vector field F, that is, the points (x, -x) with x≠ 0
57 + x + x + 130 = 167
57 + 2x + 130 = 167
187 + 2x = 167
- 187 - 187
---------------------------
2x = -20
------ -------
2 2
x = -10
The number at the end of the equation shifts the graph up or down.
Changing the 1/2 to a -2 would shift the graph down which would change the y-intercept.
The answer is D.
Answer:
(3/2x)+14
Step-by-step explanation:
The next term in this sequence would be 18.