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lehachekhar
@lehachekhar
July 2022
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помогите плз !!!!!!!!!!!!!!!!!!!
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sangers1959
Verified answer
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.
2 votes
Thanks 1
lehachekhar
просто его решить ?
sangers1959
Да.
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Answers & Comments
Verified answer
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.