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rishabhjaiswal225499
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if z is the non real fifth root of unity then the value of ^(l 1+z+z^2+z^2+z^1l)=?
 10 months ago
 10 months ago
rishabhjaiswal225499 Group Title
if z is the non real fifth root of unity then the value of ^(l 1+z+z^2+z^2+z^1l)=?
 10 months ago
 10 months ago

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rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
its find the value of 2^(l1+z+z^2+z^2z^1l) sry i wrote it wrong
 10 months ago

goformit100 Group TitleBest ResponseYou've already chosen the best response.0
is it IIT question ?
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
yup
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
you can use z+z^2+z^3+z^4=0 for z=fifth root of unity
 10 months ago

goformit100 Group TitleBest ResponseYou've already chosen the best response.0
Show your working.
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
so you know how to solve it already
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
dw:1389460828114:dw what next
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
the options are 4,2,1,none
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
simplify this 1+z+z^2+z^2+z^1
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
(????)/z^2
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
i did it by taking the denominator dw:1389461042399:dw
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
dw:1389461100403:dw
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
z+z^2+z^3+z^4=0 is incorrect
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
that gives one root as z=0
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
z^5 =1 z^5 1^5 = 0
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
(z1)(1+z+z^2+z^3+z^4) = 0 as z not = 1 (1+z+z^2+z^3+z^4) = 0
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
so your entire numerator of the exponent goes to 0
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
did u follow ? if yes, i think, you'll get the answer now :)
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
no u didnt saw that i corrected the question its 1z+z^2+z^3+z^4 and not 1+z+z^2+z^3+z^4
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
dw:1389461448241:dw
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
then i should say, there's typing error in the question OR the answer is NONE
 10 months ago

rishabhjaiswal225499 Group TitleBest ResponseYou've already chosen the best response.0
yup i also thought so thanks for your time by the way
 10 months ago

hartnn Group TitleBest ResponseYou've already chosen the best response.2
because z is complex, so will be 2^(2/z) welcome ^_^
 10 months ago
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