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If n >1 , show that the roots of the equ...

If `n >1` , show that the roots of the equation `z^n=(z+1)^n` are collinear.

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If nin Ngt1, find the sum of real parts of the roots of the equation z^(n)=(z+1)^(n).

Knowledge Check

  • If z_(0) is one of the roots of the equation z^(n)cos theta_(0)+z^(n-1)cos theta_(1)+…+z cos theta_(n-1)cos theta_(n)=2 , where theta_(i) in R , then

    A
    `|z_(0)|lt (1)/(2)`
    B
    `|z_(0)|gt (1)/(2)`
    C
    `|z_(0)|=(1)/(2)`
    D
    none of these
  • If z_(1),z_(2),z_(3),…,z_(n-1) are the roots of the equation z^(n-1)+z^(n-2)+z^(n-3)+…+z+1=0 , where n in N, n gt 2 and omega is the cube root of unity, then

    A
    `omega^(n),omega^(2n)` are also the roots of the given equation
    B
    `omega^(1//n),omega^(2//n)` are also the roots of the given equation
    C
    `z_(1),z_(2),…,z_(n-1)` form a geonetric progression
    D
    `a^((z_(r+1))/(z_( r )))` is constant for `a gt 0` and r = 1, 2, 3, …, n - 2.
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