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Mathematics 9 Online
OpenStudy (anonymous):

if z is the non real fifth root of unity then the value of ^(l 1+z+z^2+z^-2+z^-1l)=?

OpenStudy (anonymous):

its find the value of 2^(l1+z+z^2+z^-2-z^-1l) sry i wrote it wrong

OpenStudy (goformit100):

is it IIT question ?

OpenStudy (anonymous):

yup

OpenStudy (anonymous):

you can use z+z^2+z^3+z^4=0 for z=fifth root of unity

OpenStudy (goformit100):

Show your working.

hartnn (hartnn):

so you know how to solve it already

OpenStudy (anonymous):

|dw:1389460828114:dw| what next

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