Question Number 33159 by Rio Mike last updated on 11/Apr/18
$${if}\:{y}=\:\mathrm{3}{x}^{\mathrm{4}} \:{find}\:{the}\:{percentage}\:{increase}\:{in}\:{y} \\ $$$${if}\:{x}\:{increases}\:{at}\:\frac{\mathrm{5}}{\mathrm{2}}\%\:{or}\:\mathrm{2}\frac{\mathrm{1}}{\mathrm{2}}\overset{} {\%} \\ $$$${use}\:{the}\:{Binomial}\:{Expansion}\:{method} \\ $$$$\left({that}\:{is}\:{find}\:{new}\:{y}\:{and}\:{new}\:{x}\:{and}\:{simplify}\right) \\ $$