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if the roots of the equation a(b-c)x^2+b...

if the roots of the equation `a(b-c)x^2+b(c-a)x+c(a-b)=0` are equal then show that `2/b=1/a+1/c`

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A DAS GUPTA-Equations, Inequation and Expressions-Exercise
  1. The solution of |x|^(x^2-x-2)<1 is

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  2. The number of interal values of m for which the equation (1+m^(2))x^(2...

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  3. if the roots of the equation a(b-c)x^2+b(c-a)x+c(a-b)=0 are equal then...

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  4. The roots of the equation (a^2+b^2)x^2-2(b c+a d)x+(c^2+d^2)=0 are equ...

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  5. If a ,b ,c(a b c^2)x^2+3a^2c x+b^2c x-6a^2-a b+2b^2=0 ares rational.

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  6. Show that if p,q,r and s are real numbers and pr=2(q+s), then atleast ...

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  7. If a x^2+(b-c)x+a-b-c=0 has unequal real roots for all c in R ,t h e ...

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  8. -If a,b,c in R then prove that the roots of the equation 1/(x-a)+1/(x-...

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  9. If the equations ax + by = 1 and cx^2 +dy^2=1 have only one solution, ...

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  10. If a,b,c are odd integere then about that ax^2+bx+c=0, does not have r...

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  11. Show that the equation e^(sinx)-e^(-sinx)-4=0 has no real solution.

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  12. 14 For what values of p, the roots of the equation 12(p+2)x^2-12(2p-1)...

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  13. If the ratio of the roots of the equation lx^2+nx+n=0 is p:q prove tha...

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  14. If one root of equation (l-m) x^2 + lx + 1 = 0 be double of the other ...

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  15. if the roots of the equation 1/ (x+p) + 1/ (x+q) = 1/r are equal in ma...

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  16. If one root of the quadratic equation ax^(2)+bx+c=0 is equal to the ...

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  17. If a,b,c are in G.P. then the roots of the equation a x^2 + bx + c = 0...

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  18. Let a gt 0, b gt 0 then both roots of the equation ax^(2)+bx+c=0

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  19. If alpha is a root of the equation x^2+2x-1=0, then prove that 4alpha^...

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  20. If alpha, beta are the roots of the equations x^2+px+q=0 then one of t...

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