If α, β are zeroes of the polynomial 3x2 - 8x + 4 , then form a quadratic polynomial in x whose zeroes are 1/α and 1/β .

CBSE Class 10 Maths PYQ · Polynomials · Relationship of Zeros and Coefficients · 3 Marks · March 2025 · Basic

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1403 Marks · March 2025 · Basic
If $\alpha, \beta$ are zeroes of the polynomial $3x^2 - 8x + 4$, then form a quadratic polynomial in $x$ whose zeroes are $\frac{1}{\alpha}$ and $\frac{1}{\beta}$.
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Solution: (a) $p(x) = 3x^2 - 8x + 4$
$\alpha + \beta = \frac{8}{3}, \alpha\beta = \frac{4}{3}$
$\therefore \frac{1}{\alpha} + \frac{1}{\beta} = \frac{\alpha + \beta}{\alpha\beta} = 2$ and $\frac{1}{\alpha\beta} = \frac{3}{4}$
$\therefore$ required polynomial is $x^2 - 2x + \frac{3}{4}$ or $k(4x^2 - 8x + 3)$, where $k$ is a non-zero real number.
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