IB Math AA 2021 May TZ2 Paper 2 HL Q12 - Function

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[qbtorr-valorant]

Kinda late, but you made a mistake in 12(d) as it asks you for a graph of the inverse, not the normal function. Apart from that everything is extremly well done, having used your videos as a way to study has helped me improve quite a bit :) keep it up

[jootok]

Hey! I am a former IBDP student but I am practising and preparing for a re-examination to improve my grading. I was referring to your videos for solutions to know whether I have done the questions right or not and they have been extremely helpful. Thank you for the work you have done ^^
That being said, I did want to ask something;
In the c) ii bit, is it possible to show the graph decreases for x<0 by drawing the function on the GDC without considering root of x^2 = |x| and then substituting the x value with a positive or negative number, producing the graphs to show them decreasing with x being negative? Or would that be a wrong or incomplete approach?
Thank you!

[garygaza]

I guess the the domain question is hard and only 1 mark because you can use GDC to graph it hahahahhah