VCE Methods Question Thread!

[soNasty]

@Zealous i think you could do it either way though.. since [-2,inf) or [2,inf) would still give us a 1:1 function

[Zealous]

@Zealous i think you could do it either way though.. since [-2,inf) or [2,inf) would still give us a 1:1 function

Yep, they will both give a 1:1 functions. I was just thinking about the fact that they specified "largest set".

[Rishi97]

I have my methods sac next week on power functions, inverses and circular functions. How likely is it that I will have a addition of ordinates question?
I seriously hate adding/subtracting/multipling ordinates

[Reus]

I have my methods sac next week on power functions, inverses and circular functions. How likely is it that I will have a addition of ordinates question?
I seriously hate adding/subtracting/multipling ordinates

I have mine tomorrow haha! And same, ordinates is my only weakness, my teacher emphasised on subtraction of ordinates being on the SAC, and since CAS is allowed ill be fine, and so should you! Good luck

[soNasty]

Solve 2sin^2(pix)+ 3cos(pix)-3=0 over [0,2pi]
I'm not getting enough answers. Would the new domain when solving be 2pi^2? This is weird lol

[Thorium]

Solve 2sin^2(pix)+ 3cos(pix)-3=0 over [0,2pi]
I'm not getting enough answers. Would the new domain when solving be 2pi^2? This is weird lol

Here is wat i did and I got eight ten solutions.

EDIT: for the last step, i forgot to also include 4 and 6 as well

[soNasty]

how are you getting 11/3 and 17/3 if the domain is only over 0 to 2 pi?

[achre]

2pi is about equal to 6.2, and 17/3 is going to be some number smaller than 6 (because 18/3 = 6). It's actually a useful skill, especially when sketching circular functions, to figure out what the value of a number roughly is. (sqrt(3) is going to be 1.something, pi/3 will be a little bit larger than 1, etc., etc.)

[juzza12]

Super quick question guys; On exam papers do examiners mind us writing ln(x) apposed to loge(x)?

[paper-back]

Super quick question guys; On exam papers do examiners mind us writing ln(x) apposed to loge(x)?

I don't think they mind, given that ln(x) and loge(x) is practically the same thing

[lzxnl]

They CAN'T mind. Calculators say ln x, lots of maths textbooks and authors use ln x...it would be like saying chemistry doesn't recognise calling nitrogen monoxide nitrogen (II) oxide.

[Frozone]

Could someone please show me the steps to work out the following. I am having a serious mental blank here, because it seems that I am missing a vital step

[Phy124]

[vyneshr]

Hey guys, i'm having trouble writing a hybrid function;

how would i go about rewriting y=-0.05*|x²-10x+21|+6 , 0≦x≦7 as a hybrid function

Thanks in advance

[Frozone]

Thank you very much.I cannot believe I had a mental blank with such an easy question.
Now could you guys please help me with the following question(s):