Question

помогите по братски♥

Answer 1

$lim_{x to 4} frac{ x^{2} -5x+4}{16- x^{2} } = lim_{x to 4} frac{(x-1)(x-4)}{(4-x)(4+x)} = lim_{x to 4} frac{1-x}{x+4} = frac{1-4}{4+4} = frac{-3}{8}$