How do I get maple to do a higer order derivative?

Posted on 2006-04-13 20:38 By tabish (6)

Categories:

How do I ...? with Maple

Hi people, I am actually taking a maple practice test and am wondering how would I go about doing a higher order derivative of this function.

f(x) = sin(x^2/(x^10+2))*e^(2*x)

I would like to find the 8th deriavtive at x = 0 to 3 decimal places.

The answer is 112.000 but i would still like to know how to solve it as in the real test there will be one just like it.

If someone could give the algorithm that i would put it in that would be great. Used the help feature but it was not all that helpful.

Thanks in advance.

Tabish

8th order derivative

Comment on 2006-04-13 20:46 from dharr ( Maple Rating 2

158)

f:=sin(x^2/(x^10+2))*exp(2*x);
eval(diff(f,x$8),x=0);

Note that you need exp(2*x) instead of e^(2*x).

thanks so so much. You are a

Comment on 2006-04-14 09:58 from tabish (6)

thanks so so much. You are a savior

Help on higher order derivative for Maple 12

Comment on 2008-09-09 06:02 from johnyang0829 (3)

I test the following:

eval(diff(f,x$8),x=0);

however, I bring this error message,
Error, invalid input: diff received 2, which is not valid for its 2nd argument

Could anyone can help?

John

x?

Comment on 2008-09-09 08:02 from Axel Vogt ( Maple Rating 4

994)

sounds, as if your x already has some value, try x:='x'; before using that command

Also do not hesitate to check the help for (D@@8)(f)(0)

thanks you comment. I retry

Comment on 2008-09-10 16:32 from johnyang0829 (3)

thanks you comment. I retry it and all thing done well after I open new worksheet.

John

Check the syntax

Comment on 2008-09-09 07:34 from lemelinm ( Maple Rating 3

235)

I copy and paste the answers of dharr and everything works fine. The only problem I could think is : an error of syntax or maybe you should do restart and than redo the calculation.

You are right. I restart and

Comment on 2008-09-10 16:33 from johnyang0829 (3)

You are right. I restart and redo the calculation, then everything go well! Thanks!

John