Ranges of simple quadratic functions

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SUMMARY

The discussion focuses on determining the range of the variable y in the context of a quadratic function represented as a fraction of two quadratic equations: Y = (ax^2 + bx + c) / (px^2 + qx + r). The key equations derived include the discriminant condition (b - qy)² - 4(a - py)(c - ry) ≥ 0, which is essential for establishing the conditions under which y can take on specific values. The conversation highlights the need for clarity in the representation of quadratic equations and emphasizes the importance of understanding quadratic fractions in this context.

PREREQUISITES
  • Understanding of quadratic equations and their properties
  • Familiarity with discriminants and their role in determining real roots
  • Knowledge of algebraic manipulation of fractions
  • Basic concepts of function ranges and their implications
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  • Study the properties of quadratic functions and their graphs
  • Learn about the discriminant and its significance in quadratic equations
  • Explore the concept of rational functions and their ranges
  • Investigate methods for solving quadratic inequalities
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Students and educators in mathematics, particularly those focusing on algebra and quadratic functions, as well as anyone interested in the analysis of rational expressions and their properties.

Kartik.
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Taking a general function with two quadratic eqs,
Y = (ax^2+bx+c / px^2+qx+r)
ax+bx+c = pyx^2+qxy+ry
x^2(a-py) + x(b-qy)+(c-ry)=0
The discriminant turns out to be a+ve or a 0.
So,
(b-qy)^2 - 4(a-py)(c-ry) >or= 0
Now how does this equation yield a range for y?or can it?what are the next steps?
 
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You say you have "two quadratic equations" but I see three equations, none of which is quadratic.
 
that is probably because of me using the m.physicsforum because of which i lack a "^2”(at the 2nd equation, the way you put it) and a couple of signs of implications after the first equation(which is the attempt towards the solution) and by saying i have two quadratic equations, i mean to say one quadratic eq over the other = quadratic fraction
 

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