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golovan1158
@golovan1158
September 2021
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Даю 25 балов,помогите!!!
1.упростить выражение:
а)b/a-b + a/a+b
б)15x+y/x^2-y^2 + 11/x-y
в)x/x^2-25 - x-8/x^2-10x+25
2.доказать тождество:
x+y/x-y + x-y/x+y = 2(x^2+y^2)/x^2-y^2
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