Question Number 114166 by mohammad17 last updated on 17/Sep/20
$${if}\:{u}=\mathrm{5}{x}^{\mathrm{2}} +\mathrm{1}\:,\:{y}={u}^{\mathrm{3}} \:{then}\:\frac{{dy}}{{dx}}=? \\ $$$$\left(\mathrm{1}\right)\:\frac{{dy}}{{du}}.\frac{{du}}{{dx}}\:\:\:\:\:\left(\mathrm{2}\right)\frac{{dy}}{{du}}/\frac{{du}}{{dx}} \\ $$$$ \\ $$$${chose}\:\left(\mathrm{1}\right)\:{or}\:\left(\mathrm{2}\right) \\ $$
Commented by bobhans last updated on 17/Sep/20
$$\left(\mathrm{1}\right) \\ $$
Commented by mohammad17 last updated on 17/Sep/20
$${thank}\:{you}\:{sir} \\ $$