1. -16/17
  2. z = 2996 + i*2996;
    z = 2996sqrt(2)(cos π/4 + i sin π/4)
  3. z1 = 2, z2 = 3, z3 = - 0.5 + sqrt(3)/2, z4 = - 0.5 - sqrt(3)/2
  4. 1/3 кв. ед.
  5. (5 + sqrt(33))i/4
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