Question

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17. Calculati (f1:f2)^3, stiind ca f1 = 11 supra 24+13 supra 30 - 1 supra 5 - 19 supra 60 si f2 = 1 supra 5 + 11 supra 12 - 13 supra 25 - 26 supra 75

Answer 1

Răspuns:

f1 = ⁵⁾11/24+⁴⁾13/30 -²⁴⁾1/5-²⁾19/60

f1=55/120+52/120-24/120-38/120

f1=(45/120)⁽¹⁵

f1=3/8

f2 = ⁶⁰⁾1/5 + ²⁵⁾11/12 - ¹²⁾13/25 - ⁴⁾26/75

f2=60/300+275/300-156/300-104/300

f2=(75/300)⁽⁷⁵

f2=1/4

(f1:f2)³= (3/8:1/4)³=(3/8×4/1)³=(3/2)³=3³/2³=27/8