Given a solution
, we can attempt to find a solution of the form
. We have derivatives
Substituting into the ODE, we get
Setting
, we end up with the linear ODE
Multiplying both sides by
, we have
and noting that
we can write the ODE as
Integrating both sides with respect to
, we get
Now solve for
:
So you have
and given that
, the second term in
is already taken into account in the solution set, which means that
, i.e. any constant solution is in the solution set.
Answer:
option one is right
Step-by-step explanation:
the very first triangle is the 30 -69 -90 degree triangle ️
First you add them up and that equals 20. Then you divide by 4. So the average is 5 :)