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If the cube roots of unity are 1,omega,o...

If the cube roots of unity are `1,omega,omega^2,` then the roots of the equation `(x-1)^3+8=0` are a. `-1,1+2omega,1+2omega^2` b. `-1,1-2omega,1-2omega^2` c. `-1,-1,-1` d. none of these

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CENGAGE ENGLISH-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
  1. The smallest positive integer n for which ((1+i)/(1-i))^n=1 is (a)8...

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  2. Solve sqrt(3x^2-7x-30)+sqrt(2x^2-7x-5)=x+5.

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  3. If the cube roots of unity are 1,omega,omega^2, then the roots of the ...

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  4. If x= (7+4sqrt(3)), prove that x+1//x= 14

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  5. Prove that the locus of midpoint of line segment intercepted between ...

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  6. Solve sqrt(5x^2-6x+8)-sqrt(5x^2-6x-7)=1.

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  7. Show that: sum(r=0)^(n-1)|z1+alpha^r z2|^2=n(|z1|^2+|z2|^2),w h e r e,...

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  8. Solve sqrt(x^2+4x-21)+sqrt(x^2-x-6)=sqrt(6x^2-5x-39.)

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  9. If alpha=(z-i)(z+i), show that, when z lies above the real axis, alpha...

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  10. Solve 4^x+6^x=9^xdot

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  11. Let x1, x2 are the roots of the quadratic equation x^2+a x+b=0,w h e r...

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  12. Solve 3^(2x^2-7x+7)=9.

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  13. Plot the region represented by pi/3lt=a r g((z+1)/(z-1))lt=(2pi)/3 in ...

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  14. How many solutions does the equation(8^x + 27^x)/(12^x +18^x) = 7/6hav...

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  15. Is the following computation correct? If not give the correct compu...

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  16. Consider an equilateral triangle having verticals at point A(2/sqrt3 e...

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  17. Find the number of real roots of the equation (x-1)^2+(x-2)^2+(x-3)^2=...

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  18. Find the value of (i) (i^(592)+i^(590)+i^(588)+i^(586)+i^(584))/(i^(58...

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  19. Let z,z(0) be two complex numbers. It is given that abs(z)=1 and the n...

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  20. Show that the equation a z^3+b z^2+ barb z+ bara =0 has a root alpha ...

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