Q14 (1 Viewer)

[Rafy]

Discuss your answers to Q14 here.

 

[Rawf]

Lol I got 14a (iv) wrong -___-
I was like wth do I do?! so I started trying discriminant but the things to the power of 4... then I substituted x^2 = u but that didnt work cause I had x^3

Then after the exam my friend said its just k>32 so the min point wouldnt cut the x axis -________- fml

 

[tarce94]

What did people get for the Volume of the solid

 

[Timske]

What did people get for the Volume of the solid

I got a fraction, like 21/1/3 something like that...

 

[Kimyia]

Lol I got 14a (iv) wrong -___-
I was like wth do I do?! so I started trying discriminant but the things to the power of 4... then I substituted x^2 = u but that didnt work cause I had x^3

Then after the exam my friend said its just k>32 so the min point wouldnt cut the x axis -________- fml

Yeah, I got k>32. Took me a while to think of it though because I kept thinking about the discriminant but it wouldn't work.

I got a fraction, like 21/1/3 something like that...

Sames. I hope thats right

 

[crazy_paki123]

Lol I got 14a (iv) wrong -___-
I was like wth do I do?! so I started trying discriminant but the things to the power of 4... then I substituted x^2 = u but that didnt work cause I had x^3

Then after the exam my friend said its just k>32 so the min point wouldnt cut the x axis -________- fml

The answer was k<-32 mate :L

 

[Timske]

Yeah, I got k>32. Took me a while to think of it though because I kept thinking about the discriminant but it wouldn't work.

Sames. I hope thats right

k>32 nice

 

[osak23]

yes k less than -32

 

[Kimyia]

yes k less than -32

oh fffff should it have been -32?

 

[Timske]

wtf!

 

[osak23]

no because if you look at the graph

the only part that y=-k doesnt cut is below the minimum pt which is at -32

 

[TheOptimist]

k>32 nice

Thats what I got i'm assuming we are right , everyone else here is either trolling or genuinely failed this question

 

[Kimyia]

Thats what I got i'm assuming we are right , everyone else here is either trolling or genuinely failed this question

My thinking was that if you added 32, and raised the curve up by 32, the minimum point would no longer cross the x axis, hence no solutions so k>32?????

 

[TheOptimist]

Yep

 

[Demise]

What did everyone get for B?

 

[TheOptimist]

What did everyone get for B?

19pi/72 units cubed?

 

[Demise]

19pi/72 units cubed?

Can you show your working? I forgot what I put! ffs.

 

[Demise]

Can you show your working? I forgot what I put! ffs.

I did it now and got exactly that, in the exam I got something else. FML!

 

[Joey7]

Are you sure its not 19pi/8?

I thought it became: 9pi(19/72) which becomes 19pi/8

 

[2xL]

My thinking was that if you added 32, and raised the curve up by 32, the minimum point would no longer cross the x axis, hence no solutions so k>32?????

Correct, same for me.