Find an appropriate parametrization for the given piecewise-smooth curve in r^2, with the implied orientation. the curve c, which goes along the circle of radius 5, from the point (5, 0) above the x-axis to the point (-5, 0), and then in a straight line along the x-axis back to (5, 0). circle portion c_1(t) = for 0 lessthanorequalto t lessthanorequalto 1 line portion c_2(t) = for 1 < t lessthanorequalto 2

Step by step explanation:

To help visualize see the attached graph.

The semicircle can be parametrized by using the standard polar formulas:

Where r is the radius of the circle, therefore r=5.

Nevertheless, since we want a parameter t starting at 0 and ending at 1, notice we need to adjust the parameter s. So, we need that:

We can achieve that by setting:

Therefore, the parametrization of the semicircle becomes:

In vector form:

Then for the segment of line, y remains 0 since we are moving along the x-axis. So, y=0

While x increases from -5 to 5. When t=1, x =-5, and when t=2, x=5. It is like finding the equation of a line with ordered pairs (t, x): (1, -5) and (2, 5). Whose slope is therefore: 10. Then using the point-slope formula:

And plugging the slope and one of the points we get:

So, now we can build our parametrization for the segment of line:

x² + 3x + 7 = 0       [ax² + bx + c]

a = 1

b = 3

c = 7

quadratic formula:

    (+/- is this ±)

plug in the numbers into the variables

your answer is a