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If alphaandbeta be the roots of the equa...

If `alphaandbeta` be the roots of the equation `5x^(2)+7x+3=0`, then find then value of `(alpha^(3)+beta^(3))/(alpha^(-1)+beta^(-1))`.

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The correct Answer is:
`(12)/(125)`
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CALCUTTA BOOK HOUSE-QUADRATIC EQUATION IN ONE VARIABLE-EXERCISE-1.5
  1. Solve by applying Sreedhar Acharya's formula - (px-1)(qx+2)+r=0

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  2. If alphaandbeta be the roots of the quadratic equation x^(2)-px+q=0, t...

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  3. If alphaandbeta be the roots of the equation 5x^(2)+7x+3=0, then find ...

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  4. If alphaandbeta be the roots of the quadratic equation x^(2)+px+q=0, t...

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  5. If alphaandbeta be the roots of the quadratic equation ax^(2)+bx+c=0, ...

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  6. If alphaandbeta be the roots of the quadratic equation px^(2)-qx+q=0, ...

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  7. If the ratio of the roots of the quadratic equation lx^(2)+nx+n=0 be p...

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  8. If one root of the equation x^(2)+(5a+2)x+5a+2=0 be 5-times of the oth...

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  9. If the ratio of the roots of the quadratic equation x^(2)-px+q=0 be 2:...

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  10. If the sum of the roots of the equation x^2-px+q=0 be three times thei...

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  11. If the sum of the roots of the quadratic equation ax^(2)+bx+c=0 be equ...

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  12. Show that the roots of the equation (a^2-bc)x^2+2(b^2-ca)x+c^2-ab=0 ar...

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  13. 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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  14. Find the condition so that the roots of the equation a/(x-a)+b/(x-b)=5...

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  15. If the roots of the equation ax^2-bx+a=0 be alpha and beta, show that ...

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  16. IF p^2/qand q^2/p are the roots of the equation 2x^2+7x-4=0, find the ...

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  17. If the ratio of the roots of the quadratic equation ax^(2)+bx+c=0 be m...

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  18. If the ratio of the roots of the quadratic equation x^(2)-px+q=0 be m:...

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  19. If the difference of the roots of the quadratic equation x^(2)-px+q=0 ...

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  20. If the difference of the roots of the equations x^(2)+2px+q=0andx^(2)+...

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