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looking for value of existense differential equation

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Brenda Galabe
Brenda Galabe 2018-12-13
回答： madhan ravi 2018-12-13
Consider the differential equation x ′ = x cos(at) . For what values of (t, x) can solutions not be guaranteed? how do i find those values of (t,x)
i have :
syms x(t)
ode = diff(x,t) == x/(cos(a*t));
xsol = vpa(dsolve(ode))

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madhan ravi
madhan ravi 2018-12-13
Where there is an aymptote(discontinuity) , the solutions cannot be guaranteed

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