9-10 Use the logarithm properties in Theorem 0.5.2 to rewrite the expression in terms of r, s, and t, where r = In a, s = Inb, and t = Inc. 9. (a) In a2 bc E 11-12 Expand the logarithm in terms of sums, differences, and multiples of simpler logarithms. 12/ (a) log x +2 x+ 1 (b) In cos 5.x x3 + 5