We want a solution in the form

with derivatives


Substituting
and its derivatives into the ODE,

gives

Shift the index on the second sum to have it start at
:

and take the first term out of the other two sums. Then we can consolidate the sums into one that starts at
:
![\displaystyle(2a_2+2a_0)+\sum_{n\ge1}\bigg[(n+2)(n+1)a_{n+2}+(2-2n)a_n\bigg]x^n=0](https://tex.z-dn.net/?f=%5Cdisplaystyle%282a_2%2B2a_0%29%2B%5Csum_%7Bn%5Cge1%7D%5Cbigg%5B%28n%2B2%29%28n%2B1%29a_%7Bn%2B2%7D%2B%282-2n%29a_n%5Cbigg%5Dx%5En%3D0)
and so the coefficients in the series solution are given by the recurrence,

or more simply, for
,

Note the dependency between every other coefficient. Consider the two cases,
- If
, where
is an integer, then





and so on, with the general pattern

- If
, then


and we would see that
for all
.
So we have
![y(x)=\displaystyle\sum_{k\ge0}\bigg[a_{2k}x^{2k}+a_{2k+1}x^{2k+1}\bigg]](https://tex.z-dn.net/?f=y%28x%29%3D%5Cdisplaystyle%5Csum_%7Bk%5Cge0%7D%5Cbigg%5Ba_%7B2k%7Dx%5E%7B2k%7D%2Ba_%7B2k%2B1%7Dx%5E%7B2k%2B1%7D%5Cbigg%5D)
so that one solution is

and the other is

I've attached a plot of the exact and series solutions below with
,
, and
to demonstrate that the series solution converges to the exact one.
Yeah call 911 that would be the better option
To get the Area you need the Radius to get the Radius you need to divide 14 by 2 14/2=7
The Radius is 7 now to get the area we need to multiply 7 by 7 but also add pi 3.14
7*7*3.14=153.86
Answer:
<em>4 Groups</em>
Step-by-step explanation:
2 1/2 can be written as 2.5, and since this is division, all we have to do is divide 10 by 2.5.
10/2.5=4
Answer:
$150
Step-by-step explanation:
There are three pans of brownies each containing 25 brownies and 25 × 3= 75. Each brownie sells for $2. So, 2×75=150.