Solved papers for JEE Main & Advanced JEE Main Paper (Held On 10 April 2016)

done JEE Main Paper (Held On 10 April 2016) Total Questions - 1

• question_answer1) Let \[z=1+ai\]be a complex number, a > 0 such that \[{{z}^{3}}\] is a real number. Then the sum \[1+z+{{z}^{2}}+.....+{{z}^{11}}\]is equal to   JEE Main Online Paper (Held On 10 April 2016)
  A)
  \[-1250\sqrt{3}\,i\]                            
  done clear
  B)
  \[1250\sqrt{3}\,i\]
  done clear
  C)
  \[-1350\sqrt{3}\,i\]            
  done clear
  D)
  \[1365\sqrt{3}\,i\]
  done clear
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