java - Find power of real number -

-

I am trying to find x ^ y where x Is positive and y is a real number. Many sources are online for integer but not much for actual numbers.

Example: 

  6 ^ 4.3 = 2218.4537377949778046576946747662

I do not have to use any Math library. I know that it works: 

  exp (y * log (x))

But I get an exposure without any library Will happen. Is there a series that I can use to get real number power? I am doing it in Java.

To make a good agreement between the efficiency and ease of implementation, you can develop

"Fastest "The part is the logarithmic.

Before the power of x to find the power of 2 , assume that the x = (2 ^ n) .x ', 1 & lt; = 'X' & lt; 2 . Then ln (x) = nal (2) + ln (x ') . 

  6 = (2 ^ 2) x 1.5

evaluation from series ln (x ') = 2 argth ((x'-1 ) / (X '+ 1)) 

  LN (1.5) = 2 (0.2 + 0.2 ^ 3/3 + 0.2 ^ 5/5 ...) = 0.4 0.405333333333 0.4054649490476 0.405465107978 0.4054651087878 0.405465108108 ... LN (6) = 2 x 0.69314718056 + 0.405465108108 = 1.791759469228

then y.ln (x) , divided into integer part (Use exponentation by squirting) and partial part 

  4.3 x 1.791759469228 = 7.704565717681 e ^ 7 = 1096.633158428

For partial use, use standard teller development. 

  e ^ 0.704565717681 = 0.704565717681 + 0.704565717681 ^ 3/6 ... 1 1.70246571768 1.012647714295 2.01106472233 2.02133246059 2.02277931986 2.0229492211 2.02296632204 2.02296782814 2.02296794604 2.02296795435 2.02296795488 2.02296795491 ...

and multiply 

  6 ^ 4.3 = 1096.633158428 x 2.02296795491 = 2218.45373779

Comments

Post a Comment

Popular posts from this blog

java - org.apache.http.ProtocolException: Target host is not specified -

-
I have written a simple httprequest / response code and I am getting this error below: I used to type in my classpath httpclient, httpcore, common -Codecs and general logging. I am very new to Java and I do not know what's going on here. Please help me. code: import org.apache.http.client.HttpClient; Import org.apache.http.client.methods.HttpGet; Import org.apache.http.HttpResponse; Import org.apache.http.impl.client.HttpClientBuilder; Import org.apache.http.Header; Import org.apache.http.HttpHeaders; Public class UnshorteningUrl {public static zero main (string [] args throws exception {HttpGet request = zero; HTTP Client Client = HTTP ClientBuilder.credit (). Build (); Try {Request = New HTTP Gate ("trib.me/1lBFzSi"); HttpResponse httpResponse = client.execute (request); Header [] header = httpResponse.getHeaders (HttpHeaders.LOCATION); // Preconditions.checkState (headers.length == 1); String new url = header [0] .getValue (); System.out.println ("new url...
Read more

How to access user directory in lazarus? -

-
After I am trying to open file changelog.txt and it does not matter if I open it Need to have the user open it though it is always located in the ~ / directory. Enter the file here. Here is my code: Process TForm1.FormCreate (From: TObject); Var myFile: textfile; Line: String; Start AssignFile (myFile, '~ / changelog.txt'); Reset (myFile); While EOF (MyFile) does not readLn (myFile, Line); Label3.Caption: = (Label3.Capttion + Line + # 13 # 10); End; CloseFile (myFile); End; This does not work, however, if I replace ~ with the actual user name, then it works, however, I use the username of each user Can not know which will run my program. Any idea how can I get the username that started the program? ! Thanks Edit1: I have tried this, but this also includes a new line: RunCommand ('/ bin / bash', ['- - C ',' Whoami '], users); This is normal. The concept of "~" is an shell level and thus requires a separate shell elev...
Read more

java - Gradle dependencies: compile project by relative path -

-
Is it possible to specify a dependency on another gradeal project in the granular (in android studios) outside the current project limits? For example, with a relative path like this: dependence {collection project ('../../ stdlib / dagger'}} MyApp (path / user / foo / workspace / mypad) The app (Path / User / Foo / Workspace / MyPass / App) And I have an Android Library Project with 3 subdomules: stdlib (path is / user / foo / Utilities (Path / User / Foo / Workspace / Stadlib / Utilis) http (Path / User / Foo / Workspace / Stadlib / HT) / Li> What I have to do is compile the Dagger, Util, http module in the MyApp project. The Stidelib Library module under heavy development And MyApp will grow in the form of Growth, so I do not want to push them into a Mewen repository. I am a little change. is likely to add another Gredle projects in some way? I will push the study library into the Maven repository after the source is in search of a temp...
Read more