Home
Class 12
MATHS
The equation alpha x^(3)-2(alpha+1) x^(2...

The equation `alpha x^(3)-2(alpha+1) x^(2)+4 alpha x=0` has real roots and `alpha` is any positive integer, then the sum of the roots of the equation is

Text Solution

Verified by Experts

The correct Answer is:
4
Promotional Banner

Topper's Solved these Questions

  • PROPERTIES OF TRIANGLE, HEIGHT AND DISTANCE

    CENGAGE|Exercise Question Bank|15 Videos
  • RELATIONS AND FUNCTIONS

    CENGAGE|Exercise JEE Previous Year|12 Videos

Similar Questions

Explore conceptually related problems

If sec alpha" and cosec "alpha are the roots of the equation x^(2)-px+q=0 , then

If alpha, beta are the roots of the equation (x-a)(x-b)=5 then the roots of the equation (x- alpha)(x-beta)+5=0 are

If the roots of equation x^(3) + ax^(2) + b = 0 are alpha _(1), alpha_(2), and alpha_(3) (a , b ne 0) . Then find the equation whose roots are (alpha_(1)alpha_(2)+alpha_(2)alpha_(3))/(alpha_(1)alpha_(2)alpha_(3)), (alpha_(2)alpha_(3)+alpha_(3)alpha_(1))/(alpha_(1)alpha_(2)alpha_(3)), (alpha_(1)alpha_(3)+alpha_(1)alpha_(2))/(alpha_(1)alpha_(2)alpha_(3)) .

If cos^4 alpha +k and sin^4 alpha+k are the roots of x^2+lambda(2 x+1)=0 and sin^2 alpha+1 and cos^2 alpha +1 are the roots of x^2 +8 x+4=0, then the sum of the possible values of lambda is

Repeated roots : If equation f(x) = 0, where f(x) is a polyno- mial function, has roots alpha,alpha,beta,… or alpha root is repreated root, then f(x) = 0 is equivalent to (x-alpha)^(2)(x-beta)…=0, from which we can conclude that f(x)=0 or 2(x-alpha)[(x-beta)...]+(x-alpha)^(2)[(x-beta)...]'=0 or (x-alpha) [2 {(x-beta)...}+(x-alpha){(x-beta)...}']=0 has root alpha . Thus, if alpha root occurs twice in the, equation, then it is common in equations f(x) = 0 and f'(x) = 0. Similarly, if alpha root occurs thrice in equation, then it is common in the equations f(x)=0, f'(x)=0, and f'''(x)=0. If alpha root occurs p times and beta root occurs q times in polynomial equation f(x)=0 of degree n(1ltp,qltn) , then which of the following is not ture [where f^(r)(x) represents rth derivative of f(x) w.r.t x] ?

Repeated roots : If equation f(x) = 0, where f(x) is a polyno- mial function, has roots alpha,alpha,beta,… or alpha root is repreated root, then f(x) = 0 is equivalent to (x-alpha)^(2)(x-beta)…=0, from which we can conclude that f(x)=0 or 2(x-alpha)[(x-beta)...]+(x-alpha)^(2)[(x-beta)...]'=0 or (x-alpha) [2 {(x-beta)...}+(x-alpha){(x-beta)...}']=0 has root alpha . Thus, if alpha root occurs twice in the, equation, then it is common in equations f(x) = 0 and f'(x) = 0. Similarly, if alpha root occurs thrice in equation, then it is common in the equations f(x)=0, f'(x)=0, and f'''(x)=0. If x-c is a factor of order m of the polynomial f(x) of degree n (1ltmltn) , then x=c is a root of the polynomial [where f^(r)(x) represent rth derivative of f(x) w.r.t. x]

If alpha, beta are the roots of the equation x^(2)+x+1=0 , then the equation whose roots are alpha^(22)" and "beta^(19) , is

If alpha is a real root of the quadratic equation a x^2+b x+c=0a n dbeta ils a real root of -a x^2+b x+c=0, then show that there is a root gamma of equation (a//2)x^2+b x+c=0 whilch lies between alpha & beta

If a and beta are the roots of 2x^(2) + 4x + 5 = 0 the equation where roots are 2alpha and 2betai

CENGAGE-Quadratic Equations, Inequalities, Modulus and Logarithms-Question Bank
  1. If a x^(2)+b x+c=0 and b x^(2)+c x+a=0, a, b, c ne 0 have a common roo...

    Text Solution

    |

  2. Let r(1), r(2) and r(3) be the solutions of the equation x^(3) - 2 x^(...

    Text Solution

    |

  3. If f(x)=((x+3)^(201)(x-1)^(102)(x-5)^(305))/(x^(5)(3 x+4)^(503)), th...

    Text Solution

    |

  4. The equation alpha x^(3)-2(alpha+1) x^(2)+4 alpha x=0 has real roots a...

    Text Solution

    |

  5. Number of integral values of b for which inequality (a^(2)+1) x^(2)...

    Text Solution

    |

  6. Let f(x)=ax^(2)+bx+c, a ne 0, a, b, c in I. Suppose that f(1)=0, 50 lt...

    Text Solution

    |

  7. If alpha, beta be the roots of x^(2)+x+2=0 and gamma, delta be the roo...

    Text Solution

    |

  8. The number of integral value(s) of a so that the graph of y=16 x^(2)+8...

    Text Solution

    |

  9. Number of integral values of a such that the quadratic equation x^(2)+...

    Text Solution

    |

  10. If P(x)=x^(2)+a x+1. If P(x) is a negative integer for only one real x...

    Text Solution

    |

  11. If A=((log (2) 3)^(3)-(log (2) 6)^(3)-(log (2) 12)^(3)+(log (2) 24)^(3...

    Text Solution

    |

  12. If a, b and c be the roots of 3 x^(3)+8 x+7=0, then the value of (a+b)...

    Text Solution

    |

  13. If alpha, beta, gamma are roots of equation x^(3)-2 x^(2)-1=0 and ...

    Text Solution

    |

  14. The minimum value of the expression x^(2)-k x+alpha is 6 which is obta...

    Text Solution

    |

  15. If alpha, beta are the roots of the equation x^(2)-3 x-15=0, and ...

    Text Solution

    |

  16. If a,b,c,d in R-{0} , such that a,b are the roots of equation x^(2)+cx...

    Text Solution

    |

  17. If x+y+z=5 and x y+y z+z x=3, then the greatest value of (x) is

    Text Solution

    |

  18. Number of values of x satisfying the pair of quadratic equations x^(2)...

    Text Solution

    |

  19. If (y^(2)-5 y)(x^(2)+2 x+4) lt 2, for all x in R, then number of integ...

    Text Solution

    |

  20. Number of integral value(s) of ' x ' satisfying the equation |2 x+1|...

    Text Solution

    |