Question Number 104132 by bemath last updated on 19/Jul/20
$${what}\:{is}\:{the}\:{solution}\: \\ $$$${D}^{\mathrm{4}} {y}\:=\:\mathrm{12}{x}\:{by}\:{the}\:{variation}\: \\ $$$${of}\:{parameters}\: \\ $$
what-is-the-solution-D-4-y-12x-by-the-variation-of-parameters-