How to answer “Show that..” questions in maths every single time
HTML-код
- Опубликовано: 12 сен 2024
- Interested in going from an average Year 12 student to an ACADEMIC WEAPON? Book a call here (only if you're serious about working with me): calendly.com/v...
TikTok ♪ @mianlearning
Instagram 📷 @mianlearning @mianlearning
Free Online Community 🌐 www.skool.com/...
Interested In Working with Adrian? 📖 calendly.com/v...
Mark Scheme: show f'(x) is always positive.
u can do that, but cannot do that for all questions. For example, if f(x) = x^3, then f'(x) is not always positive, but x^3 is still always strictly increasing.
great explanation !
Glad it helped!
How do u do the second part
Uploading that video today!
You've overcomplicated so much just differentiate and set >0
You can do that for this case, but can’t do that for all cases. You can have stationary points on a function and it can still be strictly increasing. But those stationary points can only be instantaneous, cannot be completely flat over multiple x values like a hybrid function with y=0 for example.
@@mianlearning yes it really depends on how you Interpret the function