Question

calculati exercitiille​

Answer 1

Răspuns:

a)

rad2645 = 23rad5

rad1280 = 16rad5

rad245 = 7rad5

rad45 = 3rad5

23rad5/12 - 16rad5/9 + 7rad5/36 - 3rad5/16 =

Numitor comun

12 = 2^2 × 3

9 = 3^2

36 = 2^2 × 3^2

16 = 2^4

cmmmc = 2^4 × 3^2 = 144

(276rad5 - 256rad5 + 28rad5 - 27rad5)/144 = 21rad5/144 = 7rad5/48

b)

rad(20/9) = 2rad5/3

rad(5/9) = rad5/3

rad(50/9) = 5rad2/3

rad(128/9) = 8rad2/3

2rad5/3 + rad5/3 - 5rad2/3 + 8rad2/3 =

rad5 + rad2