6° - Matemática

27/02/15

                Resolva:

a) log x²+2x+1 = log x+1

Obs.: Se log_ax = log_ay -> x=y

                      \         /

                       Iguais

X²+2x+1=x+1

X²+2x+1-1-x=0

X²+x=0      ->x=0

X(x+1)=0 /

                 \

                  ->x+1=0

                      x=-1