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nastenk1
@nastenk1
October 2021
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Пожалуйста,помогите!
задание в фото.Если плохо видно - пишите
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evstifeeva07
1.(x-x+1)/(x-1)*y(x-1)/x=1/(x-1)*y(x-1)/x=y/x
2.a/b-((a-b)(a+b)/b^2)*b/(a+b) = a/b-(a-b)/b = a-a+b/b=b/b=1
3.(y^2+6y+9-y^2+6y-9/(x-3)(x+3))/(x^2+6y+9)/12y =(12y/(x-3)(x+3))*((x-3)(x-3)/12) = x-3/x+3
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nastenk1
/ это разделить?
evstifeeva07
да
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Answers & Comments
2.a/b-((a-b)(a+b)/b^2)*b/(a+b) = a/b-(a-b)/b = a-a+b/b=b/b=1
3.(y^2+6y+9-y^2+6y-9/(x-3)(x+3))/(x^2+6y+9)/12y =(12y/(x-3)(x+3))*((x-3)(x-3)/12) = x-3/x+3