(a) f{x) = (7x9 + 3)3 O Polynomial function only C) Rational function only 0 Both polynomial and rational function 0 Neither polynomial nor rational function 9x9 + 6x5 (b) 90') = m 0 Polynomial function only 0 Rational function only 0 Both polynomial and rational function 0 Neither polynomial nor rational function (c) hlx) = -3x'9 + 5x'5 - 6 O Polynomial function only 0 Rational function only 0 Both polynomial and rational function 0 Neither polynomial nor rational function (le'lX) = (-X5 + 2J - 9)2 O Polynomial function only 0 Rational function only O Both polynomial and rational function 0 Neither polynomial nor rational function