Hey there!
Yes, I do remember the Parametric Function test(s) but there were multiple tests. Could you add some pictures for some of the problems? I'd be glad to help.
<em>God Bless!</em>
<em>-X8lue83rryX</em>

Substituting this into the other ODE gives

Since
, it follows that
. The ODE in
has characteristic equation

with roots
, admitting the characteristic solution

From the initial conditions we get



So we have

Take the derivative and multiply it by -1/4 to get the solution for
:

Answer: Z=5
Step-by-step explanation:
Solve the rational equation by combining expression and isolating the variable z
Actually,
I think the question should be, "In what range(s) of x-values must
there be a root of the POLYNOMIAL?"
Unless you are working with some real strange maths, polynomials are
smooth and continuous. If you drew a smooth and continuous line through
the points in the graph, where would the line have to cross the x-axis?