**TI83F* AppVariable file 12/24/08, 18:29a PGLA111PNnav 868E89BEB1644A6EA4327E33887122BEGLA111.GLA1111   asymptote <asymptote:ÖA line that a graph approachesÖbut never crosses. complex fraction\complex fraction:ÖA fraction that has one or more fractions in the numerator or denominator. excluded value}excluded value:ÖAny value of a variable that results in a denominator of 0 must be excluded from the domain of that variable. extraneous solutionsNextraneous solutions:ÖResults that are not solutions to the original equation. inverse variation?inverse variation:ÖAn equation of the form xy = k, where k  0. least common denominator (LCD)©least common denominator (LCD):ÖThe least common multiple of the denominators of two or more fractions.ÖExample: 12 is the least common denominator of 1/3, 3/4, and 5/6. least common multiple (LCM)¡least common multiple (LCM):ÖThe least nonzero number that is a common multiple of two or more numbers.ÖExample: 36 is the least common multiple of 3, 9, and 12. mixed expression ^mixed expression:ÖAn expression that contains the sum of a monomial and a rationalÖexpression.   product rule fproduct rule:ÖIf ( x1 , y1 ) and (x2 , y2) areÖsolutions to an inverse variation, thenÖy1 x1 = y2 x2 .  rate problems Yrate problems:ÖRational equations are used to solve problems involving transportal rates.  rational equationBrational equation:ÖAn equation that contains rational expressions.  rational expression[rational expression:ÖAn algebraic fraction whose numerator and denominator are polynomials.  rational function~rational function:ÖAn equation of the formÖf(x) = ((p(x))/(q(x))), where p(x) and q(x) are polynomial functions, and q(x)  0. work problems Rwork problems:ÖRational equations are usedÖto solve problems involving work rates.k}