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Differential Equations
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OpenStudy (anonymous):
Solve the following IVP and find the interval of validity for the solution. xyy' +4x^2+y^2=0 y(2)=-7 how does he go from v(v+xv')=-4-v^2 on the website notes to vxv'=-4-2v^2.. not seeing the picture link http://tutorial.math.lamar.edu/Classes/DE/Substitutions.aspx
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OpenStudy (anonymous):
dumb i figured it out
OpenStudy (jhannybean):
Explain? :P
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