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If alpha, beta are the roots of the equa...

If `alpha, beta` are the roots of the equation : `2x^2-2(1+n^2)x+(1+n^2+n^4)=0`, then what is the value of `alpha^2 + beta^2` ?

A

`2n^2`

B

`2n^4`

C

2

D

`n^2`.

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MODERN PUBLICATION-LINEAR INEQUATIONS-EXERCISE
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  2. What is the value of x satisfying the equation : 16((a-x)/(a+x))^3= (a...

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  3. If alpha, beta are the roots of the equation : 2x^2-2(1+n^2)x+(1+n^2+n...

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  4. The roots of Ax^2 + Bx + C =0 are r and s. For the roots of x^2+ px + ...

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  5. What is the value of ((-1+i sqrt3)/2)^900+ ((-1-i sqrt3)/2)^301 ?

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  6. If 2^x+3^y =17 and 2^(x+2)-3^(y+1)=5, then what is the value of x ?

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  7. What is ((sqrt3+i))/((1+sqrt3 i)) equal to ?

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  8. If z1, z2, z3 are complex numbers such that |z1|= |z2|= |z3| =|1/z1+1/...

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  9. For positive integers n1,n2, the value of the expression : (1+i)^(n1)+...

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  10. If z1, z2 are two complex numbers satisfying the equation |(z1 +z2)/(z...

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  11. The equation z bar z+a bar z+bar a z+b=0, b in R represents a circle i...

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  12. If cos alpha+ cos beta + cos gamma = sin alpha+ sin beta +sin gamma= 0...

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  13. If x satisfies |x-1|+|x-2|+|x-3| ge6, then :

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  14. If 5le x le8, then :

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  15. If (x^2-5x+6)/(x^2-x+1) is negitive then :

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  16. Let z1 and z2 be nth roots of unity, which subtend a right angle at th...

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  17. The complex numbers z1, z2 and z3 satisfying (z1-z3)/(z2- z3)= (1-i sq...

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  18. If |z|=1 and w=(z-1)/(z+1) (where z!=-1), then R e(w) is

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  19. If z and w are two non-zero complex numbers such that |zw|=1 and Arg (...

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  20. Let z and w be two non-zero complex numbers such that ∣z∣=∣w∣ and arg(...

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