eden43
20.07.2019 •
Mathematics
Using power series, solve the lde: (2x^2 + 1) y" + 2xy' - 4x² y = 0 - -- -
Solved
Show answers
More tips
- S Society and Politics What If There s War Tomorrow, What If We Go to War?...
- S Sport How to Do a Jumping Split...
- A Animals and plants What Do Terriers Eat?...
- F Food and Cooking Discover the Benefits and Properties of Dates...
- C Computers and Internet Dynamically Assigned IP Address: What Is It and How Does It Work?...
- S Style and Beauty How to Get Rid of Acne: Scientifically Proven Methods...
- H Health and Medicine Simple Ways to Lower Cholesterol in the Blood: Tips and Tricks...
- O Other How to Choose the Best Answer to Your Question on The Grand Question ?...
- L Leisure and Entertainment History of International Women s Day: When Did the Celebration of March 8th Begin?...
- S Style and Beauty Intimate Haircut: The Reasons, Popularity, and Risks...
Answers on questions: Mathematics
- M Mathematics What s the answer - 0.5(4x - 5) 7 Pls....
- M Mathematics **10 POINTS** probablility question plase help meee...
- M Mathematics Thirty-seven is less than the difference of seven and ten times a number....
- M Mathematics Jada s brother drives 18 miles to work and then a quarter of that distance again. How far does Jada s brother drive?...
- M Mathematics GC 4pxbavl rigfhefuheihy8utiekgljdhgnmiek,gf...
- C Chemistry A student combines methane gas and oxygen gas in a reaction vessel, but does not measure the amounts of the gases. The two gases react according to the equation shown below....
- E English Why does author Moore’s mother react as she does to Moore hitting his sister ? What does author Moore learn from this event ?...
Ответ:
We're looking for a solution of the form
with derivatives
Substituting these into the ODE gives
Shifting indices to get each term in the summand to start at the same power of and pulling the first few terms of the resulting shifted series as needed gives
Then the coefficients in the series solution are given according to the recurrence
Given the complexity of this recursive definition, it's unlikely that you'll be able to find an exact solution to this recurrence. (You're welcome to try. I've learned this the hard way on scratch paper.) So instead of trying to do that, you can compute the first few coefficients to find an approximate solution. I got, assuming initial values of , a degree-8 approximation of
Attached are plots of the exact (blue) and series (orange) solutions with increasing degree (3, 4, 5, and 65) and the aforementioned initial values to demonstrate that the series solution converges to the exact one (over whichever interval the series converges, that is).
Ответ:
9514 1404 393
A
Step-by-step explanation:
The square root of any integer that is not a perfect square will be irrational.
√5 is irrational
__
Any decimal number that terminates or repeats is a rational number, regardless of sign. All of the decimal numbers shown are rational. (All terminate after a finite number of digits.)
Of course, any ratio of integers is a rational number. That's what the word "rational" means.