
Solve the equation , the roots of which are in harmonic progression.
Answer
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Hint: In the given question the roots of the equation are in harmonic progression (H.P.). So, take the roots as . Use this concept to reach the solution of the problem.
Complete step-by-step answer:
Given equation is
Let the roots of this equation are .
Transforming the equation by replacing with .
Hence the transformed equation is and the roots are transformed into .
We know that for the equation , the sum of the roots and the sum of the roots taken two at a time is .
So, by using the above formula for the equation we have
Sum of the roots
Sum of the roots taken two at a time
Since,
So, the roots are
Hence the roots of the equation are
Note: The given equation is bi-quadratic equation. Hence the equation has 4 roots. Whenever the equation is transformed, the roots of that equation will also be transformed accordingly.
Complete step-by-step answer:
Given equation is
Let the roots of this equation are
Transforming the equation by replacing
Hence the transformed equation is
We know that for the equation
So, by using the above formula for the equation
Sum of the roots
Sum of the roots taken two at a time
Since,
So, the roots are
Hence the roots of the equation
Note: The given equation is bi-quadratic equation. Hence the equation has 4 roots. Whenever the equation is transformed, the roots of that equation will also be transformed accordingly.
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