Предмет: Алгебра, автор: ikhropataia

исследуйте функцию на четность: y=ctg^2x/x^4+2x^2+2

Ответы

Автор ответа: Sencha1

y=ctg^2x/x^4+2x^2+2
Условие чётности:
y(-x)=y(x)
y=ctg^2(-x)/(-x^4)+2(-x^2)+2=ctg^2x/x^4+2x^2+2
то есть функция чётная

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