Question

представьте в виде рациональной дроби выражение:​

Answer 1

1) $\frac{x}{4}$ + $\frac{y}{3}$ = $\frac{3x+4y}{12}$

2) $\frac{c}{6}$ - $\frac{d}{12}$ = $\frac{2c-d}{12}$

3) $\frac{p}{q}$ + $\frac{q}{p}$ = $\frac{p^{2} +q^{2} }{pq}$

4) $\frac{a}{b}$ - $\frac{b^{2}}{a}$ = $\frac{a^{2}-b^{3}}{ab}$

5) $\frac{3}{2x}$ - $\frac{2}{3x}$ = $\frac{9}{6x}$ - $\frac{4}{6x}$ = $\frac{5}{6x}$

6) $\frac{a}{5c}$ + $\frac{3a}{4c}$ = $\frac{4a}{20c}$ + $\frac{15a}{20c}$ = $\frac{19a}{20c}$

7) $\frac{5x}{8y}$ + $\frac{x}{4y}$ = $\frac{5x+2x}{8y}$ = $\frac{7x}{8y}$

8) $\frac{17y}{24c}$ - $\frac{25y}{36c}$ = $\frac{51y}{72c}$ - $\frac{50y}{72c}$ = $\frac{y}{72c}$

9) $\frac{5a}{18b} - \frac{7a}{45b}$ = $\frac{25a}{90b}$ - $\frac{14a}{90b}$ = $\frac{11a}{90b}$

10) $\frac{3}{2a} + \frac{3a-b}{2a}$ = $\frac{3+3a-b}{2a}$

11) $\frac{a}{7b} + \frac{4a-b}{7b}$ = $\frac{a+4a-b}{7b}$ = $\frac{5a-b}{7b}$

12) $\frac{2a-3b}{2a-b} + \frac{7a-b}{b-2a}$ = $\frac{2a-3b}{2a-b} - \frac{7a-b}{2a-b}$ = $\frac{2a-3b-7a+b}{2a-b}$ = $\frac{-5a-2b}{2a-b}$