Question

Вычеслите предел функциии lim при x->3 дробь x^2-9/x^2-7x+12

Answer 1

$lim_{x to 3} frac{ x^{2} -9}{ x^{2} -7x+12} = left[begin{array}{c}0\0\end{array}right] = lim_{x to 3} frac{2x}{2x-7} = frac{6}{6-7} =-6$