Ответ:

Объяснение:

1. В
2. Б

3. Г

4.

• 1) (-∞: 0)∪(0: 2)∪(2: +∞)
• 2) (-∞: -3)∪(-3: 4)∪(4: +∞)
• 3) (-∞: -4)∪(-4: 4)∪(4: +∞)

5.

• 1) [tex]\frac{4a}{5b}[/tex]
• 2) [tex]\frac{3xa}{2b}[/tex]
• 3) [tex]\frac{3}{x+2}[/tex]

• 4) [tex]\frac{a}{b+3}[/tex]

6.

• 1) [tex]\frac{5p}{p-q} + \frac{5q}{q-p} = \frac{5p}{p-q} - \frac{5q}{p-q} = \frac{5p-5q}{p-q} = 5[/tex]

• 2)    [tex]\frac{n(3m+n)+m(m-3n)}{n^{2} m^{2} }[/tex]

7.

[tex]\frac{2m}{m-3} + \frac{m}{m+3} + \frac{2m^{2}}{9-m^{2}} = \frac{2m(m+3)}{(m-3)(m+3)} + \frac{m(m-3)}{(m+3)(m-3)} + \frac{2m^{2}}{(m+3)(m-3)} = \frac{2m(m+3) + m(m-3) + 2m^{2}}{(m+3)(m-3)} = \frac{5m^{2} + 3m}{(m+3)(m-3)}[/tex]

8.

• 1) [tex]\frac{m^{2}(1+3m)}{m^{2}} - \frac{9}{m2} = 1+3m- \frac{9}{m2}[/tex]

• 2) [tex]\frac{x(x+1)}{x+1} - \frac{3}{x+1} = x - \frac{3}{x+1}[/tex]

9.