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Question: how to dsolve these two equations

Question:how to dsolve these two equations

ComputerUser 535 Maple
dsolve
July 30 2015
0

after tried dsolve(sol, [a,b,c]) or dsolve(sol,t), still have errors

First equation

sol := a*(diff(M(a, b, c), a))+a*b*(diff(M(a, b, c), b))*c
dsolve(sol);
Error, (in ODEtools/info) Required a specification of the indeterminate function

Second Equation

sol := a(t)*(diff(a(t), t))+a(t)*b(t)*(diff(b(t), t))*c(t)
dsolve(sol);
Error, (in ODEtools/info) Required a specification of the indeterminate function
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