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    JoJozilkree
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    Mar 10,  · As #x^5+1=0#, we have #x^5=-1# and #x=root(5)(-1)=(-1)^(1/5)# Hence solution of #x^5+1=0# means to find fifth roots of #-1#. Note that as #-1=cospi+isinpi#, and we can also write.

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