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saska8
@saska8
July 2022
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Прошу, помогите. Очень надо.
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гюйс
Verified answer
(1/а + 1/b)* 2ab/(a²-b²)=
(b+a)/ab
* 2
ab/((a+b)
(a-b))=2/(a-b)
(1/(m-n) - 1/(m+n)) : 2/(3m-3n)=(m+n-m+n)/(
(m-n)
(m+n)) * 3
(m-n)
/2=
2
n/(m+n) * 3/
2
=3n / ((m+n)
a - ((a²-5a)/(a+1)) * 1/(a-5)=a - ((a
(a-5)
/a+1) * 1/
(a-5)
)=a - (a/a+1)=(a(a+1)-a)/(a+1)=(a²+a-a)/(a+1)=a²/(a+1)
(x²-y²)/xy : (x-y)/3y * 1/(x+y)=(
(x-y)(x+y))
/x
y
* 3
y
/(
x-y
) * 1/
(x+y)
=3/x
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Answers & Comments
Verified answer
(1/а + 1/b)* 2ab/(a²-b²)=(b+a)/ab * 2ab/((a+b)(a-b))=2/(a-b)(1/(m-n) - 1/(m+n)) : 2/(3m-3n)=(m+n-m+n)/((m-n)(m+n)) * 3(m-n)/2=2n/(m+n) * 3/2=3n / ((m+n)
a - ((a²-5a)/(a+1)) * 1/(a-5)=a - ((a(a-5)/a+1) * 1/(a-5))=a - (a/a+1)=(a(a+1)-a)/(a+1)=(a²+a-a)/(a+1)=a²/(a+1)
(x²-y²)/xy : (x-y)/3y * 1/(x+y)=((x-y)(x+y))/xy * 3y/(x-y) * 1/(x+y)=3/x