微積分｜神技懶人包｜送你6招｜DSE數學M2台

[@kimileung5452]

条片真系好好笑😂😂😂😂，由其系食蕉个到😂😂

[@JUSTFORSTUDYING1]

求教 partial differentiation 😢 堆level curve / directional derivative / 同 maximum minimum 好難😢

[@wesleycrazy8497]

Yes😢😢 希望可以教埋differential equation
做極都唔明