ffs I got the maximum turning point wrong.. (1 Viewer)

[MATHSCAPE]

mmm yeah thats what our teachers tell us but id be surprised if they took marks off cos the question says "f(x) has one maximum turning point, find the coordinates of the turning point" and when you solve f'(x) you only get one possible x value that solves f'(x) = 0 so it would be fair to assume that it is the maximum turning point the question is referring too

yeh, exactly what I was thinking!

 

[SpiralFlex]

Will be interesting to see what happens. I would think it would be unfair not to give the 2 marks for just the correct answer.

 

[MATHSCAPE]

from terry lee's solutions "The question does not ask you to prove that this is maximum."

 

[jamesfirst]

Same here, i was taught to show it regardless the mark allocated to that question

you have to show it. The point of the question is to SHOW the maximum point.