Пожалуйста помогите решить номер 204, 205, 206

204.1: a = 5 log5(5) = 1 log5(1/5) = -1 log5(sqrt(5)) = 1/2 204.2: a = 2 log2(64) = 6 log2(1/8) = -3 log2(128) = 7 204.3: a = 7 log7(7) = 1 log7(1/7) = -1 log7(49) = 2 204.4: a = 2 log2(4) = 2 log2(1/16) = -4 log2(1/64) = -6 205.1: a = 3 log3(243) = 5 log3(1/81) = -4 log3(27) = 3 205.2: a = 1/5 log1/5(5) = -1 log1/5(25) = -2 log1/5(1/625) = 4 205.3: a = 1/2 log1/2(4) = -2 log1/2(8) = -3 log1/2(1/32) = 5 205.4: a = 1/3 log1/3(3) = -1 log1/3(9) = -2 log1/3(1/27) = 3 206:  1) log12(3) + log12(4) = log12(3*4) = log12(12)=1 2) log7(98) - log7(2) = log7(49) = 2 3) log2(5/35*56) = log2(8)=3 4) log1/3(5/5*9) = log1/3(9) = -2