Question

приведите к общему знаменателю ​

Answer 1

5.

1) a/y, b/xy

a/y = a•x / y•x = ax/xy

2) 3/x, 4/xy

3/x = 3•y / x•y = 3y/xy

3) 4/3x⁴, 4/5y³, 5/15x³y⁴

4/3x⁴ = 4•5xy⁴ / 3x⁴•5xy⁴ = 20xy⁴/15x⁵y⁴

4/5y³ = 4•3x³y / 5y³ • 3x³y = 12x³y/15x³y⁴

6.

1) 1/c, 2/c²

1/c = 1•c / c•c = c/c²

2) a/4n, b/8n

a/4n = a•2 / 4n•2 = 2a/8n

3) 3/c³, 1/c²

1/c² = 1•c / c²•c = c/c³

4) a/12b, b/18a

a/12b = a•3a / 12b•3a = 3a²/36ab

b/18a = b•2b / 18a•2b = 2b²/36ab

7.

1) 1/3x, 15/y, 7/45xy

1/3x = 1•15y / 3x•15y = 15y/45xy

15/y = 15•45x / y•45x = 675x/45xy

2) a/3b, 1/ab, 3b/4a

a/3b = a•4a / 3b•4a = 4a²/12ab

1/ab = 1•12 / ab•12 = 12/12ab

3b/4a = 3b•3b / 4a•3b = 9b²/12ab

3) 2/k², 1/12kt, 3/t³

2/k² = 2•12kt³ / k²•12kt³ = 24kt³/12k³t³

1/12kt = 1•k²t² / 12kt•k²t² = k²t²/12k³t³

3/t³ = 3•12k³ / t³•12k³ = 36k²/12k³t³