Question

[(1 supra3 )la puterea 20 - (1 supra 3) la puterea 21 - (1 supra 3) la puterea 22 ] x 3 la puterea 22 = ?

Answer 1

((1/3)^20-(1/3)^21-(1/3)^22)*3^22=
(1/3)^20*3^22 - (1/3)^21*3^22 - (1/3)^22*3^22=
3^2-3^1-3^0=
9-3-1=
5

^ inseamna la puterea
* inseamna inmultit


Sper ca te-am ajutat.