Mathematics Extension 1 Exam Predictions/Thoughts (1 Viewer)

[greetings]

I got A for mc10

 

[worldno17]

will i lose a mark if i accidentally expressed alpha in terms of k instead of k in terms of alpha? i had k in terms of alpha a few lines up :'( did extra few lines of working to get alpha in terms of k ahhhhHhh

 

[greetings]

How did you guys go about finding the angle in projectile?
I found dy/dx on the cartesian equation at the x-coord for A, then used angle between two lines with y=-x. Got 45° tho

 

[tillitiger]

ye but also u can't use all of f(x) <= 1 anyway so u need to choose either x<-1 or -1<x<0 or 0<x<1 and looking at the actual equation given the -1<x<0 is the one where an inverse exists?
am I horrendously wrong

 

[greetings]

ye but also u can't use all of f(x) <= 1 anyway so u need to choose either x<-1 or -1<x<0 or 0<x<1 and looking at the actual equation given the -1<x<0 is the one where an inverse exists?
am I horrendously wrong

Desmos | Graphing Calculator

www.desmos.com

 

[tillitiger]

oh ok
to be fair I kinda already knew I was stupid

 

[Arrowshaft]

How did you guys go about finding the angle in projectile?
I found dy/dx on the cartesian equation at the x-coord for A, then used angle between two lines with y=-x. Got 45° tho

75-45, so it came to an angle of 30 degrees

 

[tywebb]

Can someone post the full paper

It is attached

 

[Arrowshaft]

ye but also u can't use all of f(x) <= 1 anyway so u need to choose either x<-1 or -1<x<0 or 0<x<1 and looking at the actual equation given the -1<x<0 is the one where an inverse exists?
am I horrendously wrong

Yeah I got -1<x<1, so I got A

 

[Chamoun]

It is attached

Thansk heaps

 

[fet]

I got A for mc10

is A correct? just want to confirm because I got A as well

 

[PaxProbliscum]

guys for the binomial is it k = 5 or k = 14, since the question asks for which k for x^k = x^k + 1.
Plugging the expression into a calculator to expand gives that x^14 = x^15.

So is k = 14 the only correct answer here?

 

[Arrowshaft]

is A correct? just want to confirm because I got A as well

Yeah A is correct. I also checked on wolfram alpha, and we’re good yay

 

[Arrowshaft]

guys for the binomial is it k = 5 or k = 14, since the question asks for which k for x^k = x^k + 1.
Plugging the expression into a calculator to expand gives that x^14 = x^15.

So is k = 14 the only correct answer here?

Yep k=14 is correct

 

[Arrowshaft]

Carrotsticks, when can we expect the solutions haha not to pressure you

 

[fet]

Yeah A is correct. I also checked on wolfram alpha, and we’re good yay

HECK TO THE YEA

 

[Minecraft]

who else got OA equals 250.37 (approximation) for the projectile motion

 

[Balajanovski]

Man. I'm so disappointed with how I went in this paper.
I wasn't able to complete 14ii, but I was able to finish everything else.
However, the solution was so simple and I'm kicking myself that I didn't see it.

Fuck, I honestly found the 4u paper easier.

 

[Idkwhattoput]

Is it just me, or did anyone else notice that the projectile motion question asked to not only find the distance OA, but also the point A?

 

[Balajanovski]

Is it just me, or did anyone else notice that the projectile motion question asked to not only find the distance OA, but also the point A?

Oh shit you're right.