[(-3)^3] ^3 ×(+3)^7 ÷[(+3)^5] ^3
[(-3)^3] ^3 ×(+3)^7 ÷[(+3)^5] ^3
42)
$[(-3)^3]^3 ×(+3)^7 ~÷~[(+3)^5]^3 =$
$= (-3)^{3×3}×3^7~÷~3^{5×3}=$
$= (-3)^9×3^7~÷~3^{15}=$
$= (-3)^{9+7-15}=$
$= (-3)^1=$
$=-3$
@gramor gramor grazie infinitamente.. Ti auguro una notte serena!
[(-3)^3] ^3 ×(+3)^7 ÷[(+3)^5] ^3
(-3)^(3*3) * 3^7 / 3^(5*3)
(-3)^9 * 3^7 / 3^15
-3^9 * 3^(7-15)
-3^9 * 3^-8
-3^9 / 3^8
-3