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he11sp0re
@he11sp0re
November 2021
1
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Помогите доказать тождество:
1)
2)
Последнее задание осталось. Не понимаю
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sedinalana
Verified answer
1
1)(b+2)/(b-1)²*3(b-1)/[(b-2)(b+2)]=3/[(b-1)(b-2)]
2)3/[(b-1)(b-2)]-3/(b-2)=(3-3b+3)/[(b-1)(b-2)]=-3(b-2)/[(b-1)(b-2)]=3/(1-b)
2
1)1/(a-2)²+2/[(a-2)(a+2)+1/(a+2)²=(a²+4a+4+2a²-8+a²-4a+4)/(a²-4)²=
=4a²/(a²-4)²
2)4a²/(a²-4)*(a²-4)²/2a=2a
2 votes
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Answers & Comments
Verified answer
11)(b+2)/(b-1)²*3(b-1)/[(b-2)(b+2)]=3/[(b-1)(b-2)]
2)3/[(b-1)(b-2)]-3/(b-2)=(3-3b+3)/[(b-1)(b-2)]=-3(b-2)/[(b-1)(b-2)]=3/(1-b)
2
1)1/(a-2)²+2/[(a-2)(a+2)+1/(a+2)²=(a²+4a+4+2a²-8+a²-4a+4)/(a²-4)²=
=4a²/(a²-4)²
2)4a²/(a²-4)*(a²-4)²/2a=2a