Вправи 301 - 400 » 377

377. Запишіть як степінь з натуральним показником: 1) (b + 9)–1 = 1/(b+9); 3) (a3 – b3)–1 = 1/(a^3-b^3 ); 5) (1/2mp)–1 = 2mp; 7) ((x-1)/(x+3))–1 = (x+3)/(x-1); 9) ((2a- b)/(b+3a))–1 = (b+3a)/(2a- b). 2) (x – y)–1 = 1/(x- y); 4) (1/(x- y))–1 = x – y; 6) (1/(z^2-x^2 ))–1 = z2 – x2; 8) (x/(z+y))–1 = (z+ y)/x;