Question

3 la puterea 21+3 la puterea 20+3 la puterea 19):39=

Answer 1

$(3^2^1+3^2^0+3^1^9):39= \\ =3^1^9(3^2+3+1):39= \\ =3^{19}\cdot13:39= \\ =3^{19}\cdot13:13\cdot3= \\ =3^{19}\cdot1\cdot3= \\ =3^2^0$