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Solve for x : x^6-1=0....

Solve for x : `x^6-1`=0.

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A DAS GUPTA-COMPLEX NUMBERS-EXERCISE
  1. Find the value of : (1+i)^n, n inN

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  2. Solve for x : x^5-1=0.

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  3. Solve for x : x^6-1=0.

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  4. Solve for x : x^5+x^3-x^2-1 =0.

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  5. Solve for x : x^4+x^3+x^2+x+1 =0.

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  6. Sum of common roots of the equations z^(3) + 2z^(2) + 2z + 1 =0 and z...

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  7. Solve: "^8C0x^8+^8C2x^6+^8C4x^4+^8C6x^2+1=0.

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  8. Find the integral solutions of the following equation: (1-i)^x=(1+i)^x

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  9. Solve (1+i)^x = 2^x where x is an integer ne 0.

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  10. If x^2-2xcos theta+1=0, then the value of x^(2n)-2x^n cosntheta+1, n ...

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  11. If 2cos A = x+1/x , 2cosbeta=y+1/y then show that 2cos(A-B) =x/y+y/x.

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  12. If xn =cos ((pi)/(2^(n)))+isin((pi)/(2^(n)))Prove that x1 x2…..xoo=-1

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  13. If z1, z2 be the complex numbers satisfying x^2+4=2x, prove that z1^n+...

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  14. If z=costheta+isintheta is a root of the equation a0z^n+a2z^(n-2)++a(n...

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  15. If z=costheta+isintheta is a root of the equation a0z^n+a2z^(n-2)++a(n...

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  16. If z^7+1 =0 then cos(pi/7) cos((3pi)/7) cos((5pi)/7) is (A) 1/8 ...

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  17. Hence deduce that cos(pi)/(9)cos(2 pi)/(9)cos(3 pi)/(9)cos(4 pi)/(9)=(...

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  18. (2+omega+omega^2)^3+(1+omega-omega^2)^3=(1-3omega+omega^2)^4=1

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  19. (i) If alpha,beta be the imaginary cube root of unity, then show that ...

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  20. If x=a+b,y=aomega+bomega^2 nd z=omega^2+bomega, prove that x^3+y^3+z^3...

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