Hi, i want to have a reduction formula for this problem i hope that you can help me with this :)

J[k] = int((x^2-121)^k, x = 0 .. 11)

thanks in advance:)

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- February 2nd 2008, 02:03 PMplayer07Help with reduction formula
Hi, i want to have a reduction formula for this problem i hope that you can help me with this :)

J[k] = int((x^2-121)^k, x = 0 .. 11)

thanks in advance:) - February 2nd 2008, 04:23 PMmr fantastic
*Assuming*you're familiar with the hyperbolic functions sinh and cosh, I think the simplest approach (and I leave myself wide open to an *ahem* from someone like Krizalid) is to first make the substitution .

This will lead to which can be done using a well known reduction formula (that you might find easier to derive):

.

Then just sub back .... - February 3rd 2008, 02:33 AMplayer07
Hi mr fantastic, maybe you have missunderstand what i have written

i will rewrite the question

the reduction formula for this :

http://213.89.80.30:8080/math%20problem.jpg

can you look again to the question please. - February 3rd 2008, 07:22 AMbobak
He really didnt misunderstnad you.

You have misunderstood him! - February 3rd 2008, 10:07 AMplayer07
thank you for you help :)