Mathematics: Post your doubts here!

[DeadlYxDemon]

I gave variant 12
The volume was 16/3pi.
I am 100% sure about that

I had the same Variant. Well. ...

 

[Kiara P.]

How can I do the upper/lower bound of a certain shape/perimeter?
Anyone..?

Thanks !!

 

[Georgtchernev45]

the volume is 16/3 pi

 

[Georgtchernev45]

What did youn guys get on the wheel question? Talking about P1 variant 12
For greatest height i subbed t=0 and got that h=60 m

And to show that k=1/15Pi i subbed h=0 and got it

Also for part iii of the question where you need to find the time when h=90 m i got values t=10 and t=20 but i wrote that the right time was t=10

 

[Georgtchernev45]

Since in the second part of the question they said that it completes the ride in 30 min
so i put t=10 as the right value

 

[nehaoscar]

What did youn guys get on the wheel question? Talking about P1 variant 12
For greatest height i subbed t=0 and got that h=60 m

And to show that k=1/15Pi i subbed h=0 and got it

Also for part iii of the question where you need to find the time when h=90 m i got values t=10 and t=20 but i wrote that the right time was t=10

Can't discuss until 24 hrs here

 

[Sarah Ch]

What was the value of p? What was range of g? Function question.

 

[Heyyy]

What did youn guys get on the wheel question? Talking about P1 variant 12
For greatest height i subbed t=0 and got that h=60 m

And to show that k=1/15Pi i subbed h=0 and got it

Also for part iii of the question where you need to find the time when h=90 m i got values t=10 and t=20 but i wrote that the right time was t=10

Greatest was 120

Second part was easy

III part men 90 would come twice...hence 10 and 20 both correct

 

[Heyyy]

Ooops I am sorry no discussion
Sorry

 

[Georgtchernev45]

i didn't cross t=20 so will it be correct ?

 

[DeadlYxDemon]

the volume is 16/3 pi

Yes it is I will at least get marKs cuz in the last step I did this ' -8/3 - 8" which was actually "-8/3 - (-8)"

 

[Ram97]

Less than 0.5

 

[Komail Sabba']

What did youn guys get on the wheel question? Talking about P1 variant 12
For greatest height i subbed t=0 and got that h=60 m

And to show that k=1/15Pi i subbed h=0 and got it

Also for part iii of the question where you need to find the time when h=90 m i got values t=10 and t=20 but i wrote that the right time was t=10

Greatest was 120

Second part was easy

III part men 90 would come twice...hence 10 and 20 both correct

120
proof, easy
10<t<25

 

[Faiqa Ahmad]

120
proof, easy
10<t<25

How did you do the third part?

 

[TheJDOG]

Could someone please help me with this? Q8 part iii) I just want to know how to find c, I'm stuck here this question sucks, I was able to solve it but I can't figure out how to find c , the constant after integration .

http://maxpapers.com/wp-content/uploads/2012/11/9709_w08_qp_3.pdf

 

[Aina]

Could someone please help me with this? Q8 part iii) I just want to know how to find c, I'm stuck here this question sucks, I was able to solve it but I can't figure out how to find c , the constant after integration .

http://maxpapers.com/wp-content/uploads/2012/11/9709_w08_qp_3.pdf

 

[TheJDOG]

So there is no C, C= 0 awesome thanks !

 

[TheJDOG]

Also someone explain Q10 part (iv) please? Same paper
http://maxpapers.com/wp-content/uploads/2012/11/9709_w08_qp_3.pdf
Very weird question :/

 

[Georgtchernev45]

OH MY GOD then i probably got 69/75

 

[Georgtchernev45]

h=90 m k=1/15Pi

So h=60(1-coskt)

60-60cos1/15Pit=90

-60cos1/15Pit=30

cos1/15Pit=-1/2

1/15Pit=2/3Pi or 4/3Pi

so t= 10 and t=20