Hi, I need to plot this stuff, but unfortunately that doesn’t work and I don’t understand why. If someone could help me? diffeq3 = x3''[t] + 10*x3[t] + 0.5*(x3[t] - x4[t]) == 0 diffeq4 = x4''[t] + 10*x4[t] + 0.5*(x4[t] - x3[t]) == 0 sol1 := DSolve[{diffeq3, diffeq4, x3'[0] == 0, x4'[0] == 0, …

Razvan, Your general solution to the differential equation has complex numbers which go to zero when you ask for solutions that are real. However, because of machine precision, you have some VERY small complex parts. For example, In[20]:= posx3[0, 1, -1] Out[20]= {1. + 1.38667*10^-32 I} You mu…

See my adjustments. Tested on: $Version (* "11.3.0 for Microsoft Windows (64-bit) (March 7, 2018)" *) (* "10.2.0 for Microsoft Windows (64-bit) (July 7, 2015)" *)

Well that doesn’t work again. Wich version of the software have u got ? Because mine is 11.0 Student Version and i think my version isn t updated or kind of.

Plot complex solution obtained using DSolve?

Questions

mariuszi28cg (Mariusz Iwaniuk) April 28, 2018, 1:56pm 6

See my updated.

Read this it can help you.

Reagards, MI

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Plot complex solution obtained using DSolve?

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