Question

Найди область определения функции y=7x−2
7x+1

Answer 1

${}\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ y=\dfrac{7x-2}{7x+1}\\\\7x+1\ne0\;\;,\;\;7x\ne-1\;\;,\;\;x\ne-\dfrac{1}{7}\\\\\boxed{D(y)=\bigg(-\infty;-\dfrac{1}{7}\bigg)\cup\bigg(-\dfrac{1}{7};+\infty\bigg)}$