Question

answer fast please ASAP

Answer 1

$let \: f(x) = \frac{x { }^{2} }{1 + x {}^{2} } \\ domain \: = real \\ as \: 1 + x { }^{2} \: \: never \: \: be \: zero$

$for \: range \: put \: f(x) = y \\ y + yx {}^{2} = x {}^{2} \\ x {}^{2} = \frac{y}{1 - y} \\ x = \sqrt{ \frac{y}{1 - y} } \\ range \: = w \: - (1)$