Differential function to plot

The problem :
consider u"(x) + 9u = f(x) ;
u(0) = u'(1) = 0 , where f is a Differential function on [0,1] .
so how can i plot this function ?

3 个评论

I couldn't find this form you share. Do you mean you have something like
d2y/dx2 = 9*x
?
look at example 2.2
this one what i want to plot

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