Question$(n+n)(n-1)(n+1)$ Find the LCD of each group of fractions.
21. $\frac{1}{4}, \frac{5}{6}$
22. $\frac{1}{2}, \frac{3}{8}$
23. $\frac{3}{2}, \frac{2}{5}, \frac{1}{4}$
24. $\frac{2}{3}, \frac{5}{9}, \frac{1}{15}$
25. $\frac{5}{8}, \frac{2}{5}, \frac{4}{3}$
26. $\frac{2}{3}, \frac{3}{4}, \frac{5}{9}$ $\frac{6}{241}$
Find the LCD of each group of fractions.
27. $\frac{a+2 b}{4}, \frac{2 b-a}{6}$
28. $\frac{n-2}{12}, \frac{n+3}{15}$
29. $\frac{n-1}{15}, \frac{n+3}{20}$
36. $\frac{3}{2 x+10}, \frac{x}{5 x+25}$
37. $\frac{3 a}{a+1}, \frac{2}{a-1}$
38. $\frac{3}{a^{2}-4}, \frac{5}{a+2}$ implify.
7. $\frac{3}{n^{2}}+\frac{2}{n}$
18. $\frac{6}{x^{2} y}-\frac{4}{x y}$
19. $\frac{5}{2 x}-\frac{1}{4 x^{2}}$
20. $\frac{1}{3 x^{2}}+\frac{5}{6 x}$