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If z1,z2,z3 are the vertices of the A B...

If `z_1,z_2,z_3` are the vertices of the ` A B C` on the complex plane and are also the roots of the equation `z^3-3a z^2+3betaz+gamma=0` then the condition for the ` A B C` to be equilateral triangle is: `alpha^2=beta` (b) `alpha=beta^2` `alpha^2=3beta` (d) `alpha=3beta^2`

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RESONANCE DPP-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
  1. If a^3+b^3+6a b c=8c^3&omega is a cube root of unity then: a , b...

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  2. The image of a complex number z in the imaginary axis is (A) z (...

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  3. If z1,z2,z3 are the vertices of the A B C on the complex plane and ar...

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  4. If 2x=-1+sqrt(3)i , then the value of (1-x^2+x)^6-(1-x+x^2)^6 is 32 (b...

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  5. If i z^3+z^2-z+i=0 , where i=sqrt(-1) , then |z| is equal to 1 (b) 1/2...

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  6. Number of roots which are common to the equations x^3+2x^2+2x+1=0 and ...

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  7. If z1,z2,z3,z4 be the vertices of a parallelogram taken in anticlockwi...

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  8. Area bounded by a r g(z)=pi/3,A rg(z)=(2pi)/3 and A rg(z-2-i2sqrt(3))...

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  9. The greatest value of the modulus of the complex number ' z ' satisfyi...

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  10. The set of points on a Argand diagram which satisfy bot |z|lt=4&A ...

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  11. The number of solutions of z^3+ z =0 is 2 (b) 3 (c) 4 (d) 5

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  12. If omega is an imaginary cube root of unity, then the value of (p+q)^...

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  13. If z0,z1 represent points P ,Q on the locus |z-1|=1 and the line se...

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  14. Let z1=a+i b and z2=c+i d are two complex number such that |z1|=|z2|...

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  15. The centre of a square is at the point with complex number z0=1+i and...

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  16. Intercept made by the circle zbar z + alphabarz+baralpha z +r=0 on ...

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  17. The triangle formed by complex numbers z ,i z ,i^2z is (a)Equilatera...

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  18. If omega!=1 is n^(t h) root of unity, then value of sum(k=0)^(n-1)...

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  19. If product of the roots of the equation 3x^2-4x+(loga^2-log(-a)+3)=0 i...

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  20. The reflection of the complex number (2-i)/(3+i) , (where i=sqrt(-1) ...

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