For solving the third question, wouldn't a simpler way to get the right answer be to recognise that there is no change in Y between the two points and therefore B must be the answer as all others have a non-zero Y value for the 'change' vector?
@@SUPERSAVERHEROgamer hey! alumni student now 🫡 I don't think that is correct. As AB = OB - OA not OA + OB (which is what we use to calculate the midpoint). To elaborate: 1/2 AB finds half the vector from A to B, it is directional. 1/2(OA+OB) finds half the location of OA and OB, so it is positional.
Well in that case, half of unit 3 is vectors. There's definitely going to be vectors on this exam. Unless you are doing the alternate sequence (usually schools do that when they have year 11 and 12 in one classroom together). If that's the case, I'm not sure exactly what will be on that exam.
For solving the third question, wouldn't a simpler way to get the right answer be to recognise that there is no change in Y between the two points and therefore B must be the answer as all others have a non-zero Y value for the 'change' vector?
Have you distributed a pdf version of the exam?
In the last question part A isnt it AB (midpoint) = 1/2(-OA + OB) when finding the midpoint not 1/2(OA + OB)
No. But it is equal to 1/2(-AO + OB).
I think you made the same mistake as me, I found half AB instead of the midpoint which arent the same.
@@anonymoose1233
1/2(AB) is the mid point cuz its the diameter so the point halfway through the diameter is the Centre point
@@SUPERSAVERHEROgamer hey! alumni student now 🫡 I don't think that is correct. As AB = OB - OA not OA + OB (which is what we use to calculate the midpoint).
To elaborate:
1/2 AB finds half the vector from A to B, it is directional.
1/2(OA+OB) finds half the location of OA and OB, so it is positional.
why do you add OA and OB in Q7 (a)? Don't you have to subtract to find AB?
Will there be as many vector questions on the alternate sequence specialist test as there are on the normal sequence test?
Does anyone know if Vectors be on this year's exam? My teacher says no
Teachers said there would be no optimisation on the methods exam and that was wrong, so just prepare for it anyway.
Jade?!
@@JoelSperanzaMath it's a serious question 🤷🏼♀️
Well in that case, half of unit 3 is vectors. There's definitely going to be vectors on this exam.
Unless you are doing the alternate sequence (usually schools do that when they have year 11 and 12 in one classroom together). If that's the case, I'm not sure exactly what will be on that exam.
@@JoelSperanzaMath Ok, that makes much more sense now. Our class is combined with Grade 11
does anyone want to review the maths syllabus while we wait? I've been up since yesterday and haven't slept, I'm looking for a study buddy
jayden yun stays up till 3am studying spec, he's perfect for u
so down bad 😹💀
Jk I would love to ❤