Brenda Galabe

Last seen: presque 5 ans il y a | Actif depuis 2018

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finding laplace transform of heaviside function
trying to get lapace and plot : θ” + 2θ′ + 6θ = [H(t) − H(t − 1)], θ(0) = 4, θ′ (0) = 5, H is the Heaviside function ...

environ 7 ans il y a | 1 réponse | 0

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keep getting error when trying to take Laplace transform
trying to find laplace for homogenous equation : cI′′ + dI′ + I/e = 0 syms D2I DI I gensoln deq t s deq = 'c*D2I + d*DI + (1...

environ 7 ans il y a | 1 réponse | 0

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Question

finding general solution of differential equation
the general solution (involving constants of integration C1, C2. so far i have eigen values and vectors. need to get general so...

environ 7 ans il y a | 1 réponse | 0

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looking for value of existense differential equation
Consider the differential equation x ′ = x cos(at) . For what values of (t, x) can solutions not be guaranteed? how do i find th...

environ 7 ans il y a | 1 réponse | 0

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Question

how to lapace results
how to plot this please deqdiff = 'diff(y(t),t,t) + y(t) - cos(t)' ldeqdiff = laplace(deqdiff,t,s) sldeqdiff = subs(ldeqdi...

environ 7 ans il y a | 1 réponse | 0

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solve differential equation by method of undetermined coefficient
so given three differential equations to solve undetermined coefficient given initial solutions. not sure how to add initial con...

environ 7 ans il y a | 1 réponse | 1

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ezplot is plotting a blank plot
this error happens instead Index exceeds matrix dimensions. Error in fplot (line 56) lims = args{2};

environ 7 ans il y a | 0

Question

ezplot is plotting a blank plot
no errors nut plot is blank syms y(x) a=2; b=6; c=1; d= 8; e = 6; ode = diff(y,x) == (-d*x)/(e*y); ysol = vpa(dsolve(od...

environ 7 ans il y a | 3 réponses | 0

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Question

draw orthogonal trajectories using matlab
equation is dy/dx = -d*x/e*y syms y(x) a=2; b=3; c=5; d= 5; e = 8; ode = diff(y,x) == (-d*x)/(e*y); ysol = vpa(dsolve...

environ 7 ans il y a | 1 réponse | 0

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Question

draw orthogonal trajectories of differential equation
equation is dy/dx = -d*x/e*y syms y(x) a=2; b=3; c=5; d= 5; e = 8; ode = diff(y,x) == (-d*x)/(e*y); ysol = vpa(dsolve...

environ 7 ans il y a | 1 réponse | 0

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draw othorgonal trajectories using differential equations
thats for the first one correct ? do the same for the second. it worked great thanks also when i get this error what does it...

environ 7 ans il y a | 0

Question

draw othorgonal trajectories using differential equations
to draw orthogonal trajectories am i suppose to use dfield or is ezplot as shown below on the right track Using the Matlab dra...

environ 7 ans il y a | 2 réponses | 0

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solving a linear ODE
not sure what that means

environ 7 ans il y a | 0

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using dsolve to equation
equation is : d(x1)/dt (t) = -x1(t)*alpha+p syms x1 t tank1 = 'diff (x1,t)= - x1* alpha + p' soln1 = dsolve(tank1,'x1(0) = ...

environ 7 ans il y a | 2 réponses | 0

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Question

solving a linear ODE
how to write in matlab y = e^ int(75/80)dt

environ 7 ans il y a | 2 réponses | 0

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Question

trying to get general solution for differential equation but keep getting error
syms dx1 gensoln eq1 eq1='dx1-x2/2+20' ; gensoln = dsolve(eq1,'t');

environ 7 ans il y a | 1 réponse | 0

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Question

Undefined function 'int' for input arguments of type 'char'. keep getting error using matlab2015b
eqa= 'diff(y(t),t)+y(t)-cos(t)'; neweq1a = laplace(eqa,t,s) neweq1i = laplace(int('y(x)','x','0','t'),t,s) neweq1 = neweq1a +...

environ 7 ans il y a | 2 réponses | 0

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