Автор - kirillvalakas

Решите пожалуйста В1 с обеих вариантов

Ответ

Проверено экспертом

Автор - Universalka

B1

1)frac{1}{(b-y)(y-5)}-frac{1}{(b-y)(b-5)}-frac{1}{(b-5)(y-5)}=frac{b-5-(y-5)-(b-y)}{(b-y)(y-5)(b-5)}=frac{b-5-y+5-b+y}{(b-y)(y-5)(b-5)}=0\\2)0*frac{b^{2}-9y^{2}}{b^{4}+y^{4}}=0

B1

1)frac{1}{(a-x)(x-1)}-frac{1}{(a-x)(a-1)}-frac{1}{(a-1)(x-1)}=frac{a-1-(x-1)-(a-x)}{(a-x)(x-1)(a-1)}=frac{a-1-x+1-a+x}{(a-x)(x-1)(a-1)}=frac{0}{(a-x)(x-1)(a-1)}=0\\2)0*frac{a^{3}-8x^{3}}{a^{4}+b^{4}}=0

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