Respostas

2013-07-11T14:28:58-03:00
1/a = 1/a+1/1-1/a
1/a x 1-1/a = 1/a+1
1/a x a/1-1(-1) = 1/a+1
(corta os "a")
1 x 0 = 1/a+1
0 = 1/a+1
0 x 1 = a+1
0 = a+1
-1 = a
RESPOSTA= a = -1
1 5 1