Вправи: 212 (1-7)

212. Виконайте ділення:

1) 1a : 1b = 1a • b1 = ba;

2) 2x : 2y = 2x • y2 = 2 •yx •2 = yx;

3) 12x : 12y = 12x • 2y1 = 2y2x = yx;

4) 12x : 2y = 12x • y2 = y2x •2 = y4x;

5) 2x3 : 2y5 = 2x3 • 52y = 2x •53 •2y = 5x3y;

6) 13xy : 59x = 13xy • 9x5 = 9x3xy •5 = 35y;

7) 15x : 215xy = 15x • 15xy2 = 15xy5x •2 = 3y2;

8) 72ab : 144a = 72ab • 4a14 = 7 •4a2ab •14 = 1b;

9) 6x5 : 12y25 = 6x5 • 2512y = 6x •255 •12y = 5x2y;

10) 73a : 289b = 73a • 9b28 = 7 •9b3a •28 = 3b4a;

11) 3x8y : 2140xy = 3x8y • 40xy21 = 3x •40xy8y •21 = 5x27;

12) 92ab : 6316b = 92ab • 16b63 = 9 •16b2ab •63 = 87a.