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If a x^2+b x+c=0,a ,b ,c in R has no re...

If `a x^2+b x+c=0,a ,b ,c in R` has no real zeros, and if `c<0` , then which of the following is true? (a) `a<0` (b) `a+b+c >0` (c)`a >0`

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CENGAGE PUBLICATION-COMPLEX NUMBERS AND QUADRATIC EQUATIONS-All Questions
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  3. If a x^2+b x+c=0,a ,b ,c in R has no real zeros, and if c<0 , then wh...

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  6. If omega is a cube root of unity, then find the value of the following...

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  7. Find the domain and range of f(x)=sqrt(x^2-4x+6)

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  8. Prove that |z1+z2|^2=|z1|^2+|z2|^2, ifz1//z2 is purely imaginary.

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  9. Find the range of the function f(x)=6^x+3^x+6^(-x)+e^(-x)+2.

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  10. If omega is a cube root of unity, then find the value of the following...

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  11. If alpha ,beta are the roots of the equation 2x^2+2(a+b)x+a^2+b^2=0 th...

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  12. Let z1,z2, z3,......, zn be complex numbers such that |z1|=|z2|=...=|z...

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  13. If a ,b , in R such that a+b=1a n d(1-2ab)(a^3+b^3)=12 . The value ...

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  14. If |z|lt=4 , then find the maximum value of |i z+3-4i|dot

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  15. Find the range of f(x)=x^2-x-3.

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  16. If the fraction (x^3 +(a-10)x^2-x+a-6)/(x^3 +(a-6)x^2-x+a-10)reduces t...

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  17. The polynomial f(x)=x^4+a x^3+b x^3+c x+d has real coefficients and f(...

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  18. Find the value of i^n+i^(n+1)+i^(n+2)+i^(n+3) for all n in Ndot

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  19. If the quadratic equation a x^2+b x+c=0(a >0) has sec^2thetaa n dcos e...

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  20. Find the value of 1+i^2+i^4+i^6++i^(2n)

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