Question

помогите плз !!!!!!!!!!!!!!!!!!!

Answer 1

1. 1/(b²-2b+1)+1/(b²-1)=1/(b-1)²+1/((b-1)(b+1))=(b+1+b-1)/((b-1)²*(b+1))=
=2b/((b-1)²*(b+1)).
2. (b-1)²*2b/((b-1)²*(b+1))=2b/(b+1).
3. 2b/(b+1)+2/(b+1)=(2b+2)/(b+1)=2*(b+1)/(b+1)=2.

Answer 2

просто его решить ?

Answer 3

Да.