Mathematics Question Thread

[olivercutbill]

To illustrate the r and R, for a rate of 6% p.a.
R = 6
r = 0.06




_____________

That being said: To do that question, just deduct off the original principal and plug it into the formula. I = PrT = PRT/100 is assumed knowledge from Year 10.

Can you do the solution? I think I was taught a different way...

[RuiAce]

I suck at this part of series
Help on last q

Refer to post #631

[RuiAce]

Can you do the solution? I think I was taught a different way...

I don't have all the answers to the previous parts

[imtrying]

Hi, just wondering if someone would be able to explain to me how to do part ii) of this question?
Thank you!

[RuiAce]

Hi, just wondering if someone would be able to explain to me how to do part ii) of this question?
Thank you!

[jakesilove]

Hi, just wondering if someone would be able to explain to me how to do part ii) of this question?
Thank you!

This is just something that you need to be comfortable using



The maximum value of velocity will clearly occur when cos(theta)=-1, thus

[imtrying]

This is just something that you need to be comfortable using



The maximum value of velocity will clearly occur when cos(theta)=-1, thus

Thanks, that helps:)  Definitely wasn't thinking that one through properly!

[Rikahs]

Thanks, that helps:)  Definitely wasn't thinking that one through properly!

Btw, there is an easy method typically known by 3u or 4u students, maximum velocity occurs when the acceleration is zero; if you just differentiat velocity then make it equal to zero to find t then just sub back into velocity you get max velocity. May seem a bit more confusing or may make you go like "oh yeahhhh I see" but it can sometimes make life easier especially if you get ugly equations.

[RuiAce]

Btw, there is an easy method typically known by 3u or 4u students, maximum velocity occurs when the acceleration is zero; if you just differentiat velocity then make it equal to zero to find t then just sub back into velocity you get max velocity. May seem a bit more confusing or may make you go like "oh yeahhhh I see" but it can sometimes make life easier especially if you get ugly equations.

That works in general. 2U are taught this.

It just so happens that this is a 1 mark question and thus that method is not necessary because of the trick.

[Rikahs]

Wait I just realized something, did you do ur 2u hsc in year 10?

[nibblez16]

The whole reference sheet is in the exam right? Coz ive been hearing rumours that theyre taking out integrals part... Just confirming that the rumour is a rumour lol

[Rikahs]

Pretty damn sure that is a rumour, they can't just take out the integral section without telling the students.

[nibblez16]

Pretty damn sure that is a rumour, they can't just take out the integral section without telling the students.

Yea! I guess people are making up stuff, I mean HSC is already stressful, y give more surprises lol

[RuiAce]

Wait I just realized something, did you do ur 2u hsc in year 10?

Yes

The whole reference sheet is in the exam right? Coz ive been hearing rumours that theyre taking out integrals part... Just confirming that the rumour is a rumour lol

Pretty damn sure that is a rumour, they can't just take out the integral section without telling the students.

Yea! I guess people are making up stuff, I mean HSC is already stressful, y give more surprises lol

Only 2 or 3 of the standard integrals are not on the reference sheet. Every other standard integral has been transferred

The 2 (or 3) that have been taken out are also useless for 2U AND 3U.

[nibblez16]

Heyy! How do we know the procedure to solve this?