Thanks rickhg12hs. Rakhi
On Thursday, August 1, 2013 1:28:53 PM UTC+5:30, rickhg12hs wrote: > > On Thursday, August 1, 2013 1:50:32 AM UTC-4, Rakhi Warriar wrote: > >> I have the following function: >> >> f(x) = 1 >> ---------------- >> x^2 + 4*x + 13 >> >> I need to find its partial fraction expansion. As the factors are complex >> conjugates, I am not able to do using partial_fraction(). How can I find >> this? >> >> Commands: >> x = CC['x'].0 >> f = 1/(x^2 + 4*x+ 13) >> f.partial_fraction() >> this gives error: >> Traceback (click to the left of this block for traceback) >> ... >> AttributeError: 'FractionFieldElement_1poly_field' object has no >> attribute 'partial_fraction' >> > With Sage 5.10: > > sage: P.<x>=CC[] > sage: f=1/(x^2+4*x+13) > sage: f > 1.00000000000000/(x^2 + 4.00000000000000*x + 13.0000000000000) > sage: f.partial_fraction_decomposition() > (0, > [(-0.166666666666667*I)/(x + 2.00000000000000 - 3.00000000000000*I), > 0.166666666666667*I/(x + 2.00000000000000 + 3.00000000000000*I)]) > sage: f.partial_fraction_decomposition()[1] > [(-0.166666666666667*I)/(x + 2.00000000000000 - 3.00000000000000*I), > 0.166666666666667*I/(x + 2.00000000000000 + 3.00000000000000*I)] > sage: sum(f.partial_fraction_decomposition()[1]) > 1.00000000000000/(x^2 + 4.00000000000000*x + 13.0000000000000) > sage: f == sum(f.partial_fraction_decomposition()[1]) > True > sage: > > > -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
