Self Studies

Complex Numbers...

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  • Question 1
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    If ω is a cube root of unity , then (1+ω)(1+ω2)(1+ω4)(1+ω8)....... upto 2n factors is

  • Question 2
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    If k , l, m , n are four consecutive integers , then ik+il+im+in is equal to :

  • Question 3
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    The complex number z = x + yi which satisfies the equation  = 1 lies on

  • Question 4
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    Distance of the representative of the number 1 +i from the origin ( in Argand’s diagram ) is

  • Question 5
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    The points 3 + 4i, 3 - 4i, - 4 + 3i, - 4 - 3i are

  • Question 6
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    If |z−2|=|z−6| then locus of z is given by :

  • Question 7
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    If = 1, then

  • Question 8
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    Find the value of (2 + 2 + 22)2 + 5.

  • Question 9
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    Let x,y∈R,then x + iy is a non real complex number if

  • Question 10
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    If α and β are non-real cube roots of unity, then αβ + α5 + β5 is equal to

  • Question 11
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    If Z = 3√/2+i/2, Z3 then equals

  • Question 12
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    The real value of x will satisfy the equation ), if

  • Question 13
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    If z = x + yi; x, y ∈ R, then locus of the equation z + b = c, where c ∈ R and b ∈ C, b ≠ 0 are fixed, is a/an

  • Question 14
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    If z = , then z69 is equal to

  • Question 15
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    If (1 + i) (1 + 2i) (1 + 3i) …… (1 + n i) = x + y i; where x, y  R and n  N, then 2X5X10X…..X (1 + n2) =

  • Question 16
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    If i = , then represent 4 + 5+ 3 into a + ib form.

  • Question 17
    1 / -0

    If ω is a cube root of unity, then the value of (1 + ω)(1 + ω2)(1 + ω4)(1 + ω8) ...... up to 2n factors is

  • Question 18
    1 / -0

    Distance of the representative of the number 1 +i from the origin ( in Argand’s diagram ) is


  • Question 19
    1 / -0

    If |z−2|=|z−6| then locus of z is given by :

     

  • Question 20
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    The complex number z is such that │z│ = 1, z ≠ - 1 and w = (z - 1)/(z + 1). The real part of w is

  • Question 21
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    2√-9,√−16, is equals to

  • Question 22
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    The expression (1 + i)2+ (1 - i)2n, n  N, is

  • Question 23
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    Which one of the following equations has the root a  b?

  • Question 24
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    If w is the complex cube root of unity, then {(a + b w + c w2 )/(c + a w + b w2)} + {(c + a w + b w2 )/(a + bw + cw2)} + {(b + cw + aw2)/(b + cw + aw 2)} =

  • Question 25
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    If z1andz2 are non real complex numbers such that z1+z2andz1z2 are real numbers , then

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