Question

y = m-x/ m+x нужно найти производную

Answer 1

$frac{ frac{d}{dx} (m - x)(m + x) - (m - x) times frac{d}{dx} (m + x)}{(m + x) {}^{2} } \ frac{ - 1(m + x) - (m - x) times 1}{(m + x) {}^{2} } \ - frac{2m}{(m + x) {}^{2} }$