Answer:
I gotchu, it's A. x > -2
Step-by-step explanation:
The circle on the line is open so it means less than or greater than. If it was a close circle, it would be less than or equal to and vice versa. And the number is -2. The line excludes -2 but includes all numbers greater than that. So the answer would be A. x > -2
Complete Question
The complete question is shown on the first and second uploaded image
Answer:
The derived
Step-by-step explanation:
Step One : Consider the ellipse in equilibrium.
Looking at the ellipse in equilibrium i.e when the ellipse has settled down on the concave support (represented by a parabola ) as shown on the third uploaded image.
Step Two : Consider the ellipse equation.
Generally the equation of the ellipse is given as
Also the base on which it rest at equilibrium i.e the parabola is represented by
Substituting the value of y in the ellipse equation we have
Let
So the equation becomes
Rearranging, we get :
This equation above is a quadratic equation or a bi-quadratic equation in x as t =
Step Three : Relate the equation an the graph on the third uploaded image
We can see that from the graph , if A and B are the two values of x for which the points is made , then A + B = 0 (because they are symmetric in nature)
From Vieta's Roots(Vieta's formula is a formula that shows the relationship between the coefficients of a polynomial and the sum of its roots )
with A and B as roots
A+B =
But A + B = 0
So = 0
or we can say that
Rearranging we get
To find the slope, we need two points that are located on this line.
The following two points are on this line: (0,-4) and (3,1).
Let m = slope
m = (1 -(-4))/(3-0)
m = (1 + 4)/3
m = 5/3
The slope is 5/3.
The reciprocal of 7 is 1/7, reciprocal of 8 is 1/8, and reciprocal of 9 is 1/9