Question

1 1 −1
 = ⋅





= ⋅ a b
b
a
b
a b n b n
a a
⋅
( ) =

b c b c
a a a
+
⋅ =

b c
c
b
a
a
a −
= n
n
n
b

Answer 1

Resposta:

11-1 a reposta é 10 eu acho?