Practice questions
88551 published questions with worked solutions.
- Let a R. If the origin and the non-real roots of 2z^2+2z+a=0 form the three vertices of an equilateral triangle in the argand...
- If a complex number z lies in the interior or on the boundary of a circle of radius 3 and centre at (-4,0), then the greatest and...
- The joint of z_1=a+ib and z_2= 1 -a+ib passes through
- If z is a complex number in the Argand plane such that ( z-3 3 z+3 3 )= 3, then the locus of z is
- If is a complex cube root of unity, then (1- + ^2 )^6+ (1- ^2+ )^6=
- If is a complex cube root of unity, then the equation |z- |^2+ |z- ^2 |^2= will represent a circle, if
- If a>0 and the equation |z-a^2 |+|z-2a|=3 represents an ellipse, then a belongs to the interval
- If z_r (r=0,1,2, ,6) be the roots of the equation (z+1)^7+z^7=0, then _ r=0 ^6 Re (z_r )=
- If z=i (2- 3 ), then z=
- The general value of which satisfies the equation ( +i )( 3 +i 3 )( 5 +i 5 ) ( (2n-1) +i (2n-1) )=1 is
- If x_n= 3^n +i 3^n , then x_1 x_2 x_3 x_ is equal to
- The centre of a square is at the origin and 1+i is one of its vertices. The extremities of its diagonals which does not pass...
- Which of the following statement is true? (i) The amplitude of the product of the two complex numbers is equal to product of...
- If ( 1) is a cube root of unity, then vmatrix 1&1+i+ ^2& ^2 1-i&-1& ^2-1 -i&-i+ -1&-1 vmatrix equals
- If z_1,z_2,z_3 be vertices of an equilateral triangle occurring in the anticlockwise sense, then
- If n is a positive integer greater than unity and z is a complex number satisfying the equation z^n=(z+1)^n, then
- The value of the determinant vmatrix 1+i&1-i&i 1-i&i&1+i &1+i&1-i vmatrix , where i= -1 is
- If Re ( z+4 2z-i )= 12, then z is represented by a point lying on
- If one vertex of a square whose diagonals intersect at the origin is 3( +i ), then the two adjacent vertices are
- The value of ( 1+i 3 1-i 3 )^6+ ( 1-i 3 1+i 3 )^6 is