**TI83F* AppVariable file 12/24/08, 18:26  GLA207 nav 26CE319875DD4F1B9DFDCB650E5220B1GLA207.'GLA2071  composition of functionsÍcomposition of functions:ÖA function is performed, and then a second function is performed on the result of the first function. The composition of f and g is denoted by f g, and ÖÁf g]Áx] = fÁgÁx]].  conjugatesEconjugates:ÖThe conjugate of the binomial ab + cd is ab - cd. extraneous solutionJextraneous solution:ÖA number that does not satisfy the original equation. index|index:ÖIn nth roots, the value of n in the symbol nth . Indicates to what root the value under the radicand is being taken. inverse function­inverse function:ÖTwo functions f and g are inverse functions if and only if both of their compositions are the identity function. Áf g](x) = Ág f](x) for all values of x.ÖÖ inverse relation¦inverse relation:ÖTwo relations are inverse relations if and only if whenever one relation contains the element (a, b) the other relation contains the element (b, a). like radical expressionsdlike radical expressions:ÖTwo radical expressions in which both the radicands and indices are alike. nth rootžnth root:ÖFor any real numbers a and b, and any positive integer n, if a^n = b, then a is an nth root of b.ÖExample: 2 is the fifth root of 32 since 2^5 = 32.  principal root%principal root:ÖThe nonnegative root.  radical equationcradical equation:ÖAn equation that contains a radical expression with the variable in the radicand.  radical functionIradical function:ÖA function that contains the square root of a variable.  radical inequalitygradical inequality:ÖAn inequality that contains a radical expression with the variable in the radicand.   radical sign-radical sign:ÖIn nth roots, the symbol nth . radicanduradicand:ÖIn nth roots, the value inside in the symbol nth. Indicates the value that is being taken to the nth root. rationalizing the denominatorerationalizing the denominator:ÖTo eliminate radicals from a denominator or fractions from a radicand. square root functionKsquare root function:ÖA function that contains a square root of a variable. square root inequality=square root inequality:ÖAn inequality involving square roots.,