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Question: Unable to get output

Question:Unable to get output

imparter 170 Maple 13
differential-equation dsolve
November 05 2018
0

I am unable to the get the output  in ans2 , error is comming

 

restart:
with(DETools):
with(PDEtools):
u[o](r,z):=(-1/4)*diff(p[o](z),z)*(1-r^2):
ode:=gamma1*diff(u[o](r,z),z)+(1/r)*diff(v[1](r)*r,r)=0:
#dsolve( (ode), { v[1](r) } ):
IC1 := {v[1](0) = 0}:
ans2 := combine(dsolve(`union`(ode, IC1),{v[1](r)}));
 
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