Question

решите уравнение c параметром а
4-ax^2=0

Answer 1

$4-ax^2=0\\\\ax^2=4\\\\x^2=4/a\\\\x=\pm \sqrt{4/a}\\\\x=\pm 2/\sqrt{a}\\\\x=\pm\frac{2\sqrt{a}}{a},\;\;a>0$

при a≤0  х∈∅