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Question: zeros of the bessel function?

Question:zeros of the bessel function?

leakeg 16 Maple
May 30 2008
0

Hi, I'm trying to find the first few roots of the Bessel function (1st kind) for a few different values of v, but I'm new to Maple and am having some trouble.

This is what I've tried:

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u:= v->BesselJ(v,x);

solve({u(0)=0},{x});

                            {x=RootOf(BesselJ(0,_Z))}

evalf(%)

                            {x = -2.404825558}

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You see it only gives one negative solution, whereas I want the first three postive solutions.

Thankyou in advance for any help!
 
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