Solve Rational Inequality by Interval Method

Rational function, R(x), is of the form P(x)/Q(x) where Q(x) is not equal to 0 and both p and q are polynomials. Reciprocal of a function may not be a rational function.
Rational function may not always have a vertical asymptote.
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[Astigmaniac]

thank you sir, i was searching for this for ages

[utkarshsingh]

calculator hi use kar k karna hota tuh mein khud nahi kar leta

[krypt]

Can the test points be random or are they dependent on something?