0580 Maths paper 2 Extended disscussion!!!!

[karthik]

Guys, the order of rotational symmetry was one and the lines of symmetry were zero.
the region labelled as R by karthik in the attachment given is wrong. it was on the top right hand side.
is 0.00660 equal to two significant figures?

it was 0.0066
yes, R was on the top right hand side
There were 0 lines of symmetry
But the order of rotational symmetry was 5 right?

I gave 22 second variant

Guys it differnce in varients !!!!!

 

[karthik]

Tch Tch.......check again i gave 22 and the inequalities answer was in the top right corner......see that y is less than or equal to 2x.......this is only possible in the top right corner. Trick question....made the same mistake bt in rechecking i corrected it.

Dude y<y=2x ... so it must be backwards not forwards .. this question was ment u all to make the mistake .... o god ... u worte the right answer and then unsccerely cut it of!!!!!!!!!

 

[karthik]

Hey karthik! What was the answer you got for the angles.. There was that sort of a triangle with a circle right!

a!) =90-50
!!) = 180 - a! .....

 

[Dracula95]

Guys, the order of rotational symmetry was one and the lines of symmetry were zero.
the region labelled as R by karthik in the attachment given is wrong. it was on the top right hand side.
is 0.00660 equal to two significant figures?

Dude mine wasnt wrong ... i did a different varien paper and the symentry answer for me/us was 5 and 0 ... we got a flower and star for the symetry wat abt u?

....I did the same variant as u......it was 5 and 0......but R was in the top right hand side....check it again on a graph
Y<2X is only possible on the right hand side

 

[Dracula95]

Hey karthik! What was the answer you got for the angles.. There was that sort of a triangle with a circle right!

a!) =90-50
!!) = 180 - a! .....

FiRST one was 40........second was 65

 

[Dracula95]

Tch Tch.......check again i gave 22 and the inequalities answer was in the top right corner......see that y is less than or equal to 2x.......this is only possible in the top right corner. Trick question....made the same mistake bt in rechecking i corrected it.

Dude y<y=2x ... so it must be backwards not forwards .. this question was ment u all to make the mistake .... o god ... u worte the right answer and then unsccerely cut it of!!!!!!!!!

Look at the graph y<y=2x........so R is on the right......take any point on the left and u get Y>2x....see

For eg take (2,8) on the top left side y=8, 2x=4....so y>2x....so it is not valid on the left side
this question was made to test those who dont check whether th area is satisfying the inequalities.

 

[mimmi]

Guys where was region R?

and whats the answer for the matrix multiplication question?

 

[vardaan371]

Karthik,
I gave variant 22. i am sure about the rotational symmetry. it was 1 only.

 

[Dracula95]

hw ws it 1???? it ws 5

 

[Dracula95]

Guys where was region R?

and whats the answer for the matrix multiplication question?

top right hand side

that matrix one was (-14 0
0 -14)

 

[karthik]

Tch Tch.......check again i gave 22 and the inequalities answer was in the top right corner......see that y is less than or equal to 2x.......this is only possible in the top right corner. Trick question....made the same mistake bt in rechecking i corrected it.

Dude y<y=2x ... so it must be backwards not forwards .. this question was ment u all to make the mistake .... o god ... u worte the right answer and then unsccerely cut it of!!!!!!!!!

Look at the graph y<y=2x........so R is on the right......take any point on the left and u get Y>2x....see

For eg take (2,8) on the top left side y=8, 2x=4....so y>2x....so it is not valid on the left side
this question was made to test those who don't check whether th area is satisfying the inequalities.

OPPS ( ) looks like my graph was wrong !!!!! tks a lot for ur explanation and trying to explain me

 

[karthik]

Karthik,
I gave variant 22. i am sure about the rotational symmetry. it was 1 only.

No chance its 5 and line of symetry is 0

 

[mimmi]

Guys where was region R?

and whats the answer for the matrix multiplication question?

top right hand side

that matrix one was (-14 0
0 -14)

oh no my natrice is wrong O_O there goes 15 marks

 

[karthik]

HEY GUYS Y DONT U VoTE UP THIS DISCUSSION AND THANK ME (IF I HELPED U) ..... THANKS LETS PREPARE FOR MATHS P4.... LETS FINISH THIS DISCUSSION.....
BY CREATOR : KARTHIK

 

[Leone]

I want to add something.... This was how I got my graph... What do you guys think of it??? The coloured lines are for shading the unwanted regions....

 

[XPFMember]

Assalamoalaikum!!
According to the inequalities as: y > 2 ; x + y > 6 ; y < 2x
i think the graph shud come like this!!

 

[XPFMember]

@Leone...either u have given the incorrect inequality or ur line y=2x is wrong!!

If the inequalities is correct then my solutionis correct...plz let me know if in case i have done any mistake ...though i have tried my best to avoid any mistake!!

 

[Leone]

@Leone...either u have given the incorrect inequality or ur line y=2x is wrong!!

If the inequalities is correct then my solutionis correct...plz let me know if in case i have done any mistake ...though i have tried my best to avoid any mistake!!

Thank you very much for helping us dear!!! Anyway, I have done Y=2X wrong... Will I get any marks now that the other parts of my graph is correct??? Actually it was a silly mistake I did... If I thought about Y=X line even I could have done it right... But instead what came to my mind that time was for example if we take Y as 8 according to the formula Y=2X the value of X should be 4. Then I did this silly mistake by joining 4 to 8 that during the test I was only concerned about 8 an 4 in the formula 8=2(4). It was due to this that I joined 4 and 8 carelessly without much thinking as the other line we drew (x+y=6) too was like this. If I could have thought well then it would have been correct. I actually knew this one... Anyway, will I get any marks for the parts I did correct???

 

[XPFMember]

u might get some morks ...i have no idea though!!

 

[Leone]

I am really worried about this one... Can any one remember this one was out of how many marks??? About how many marks I may get Math angel??? Please tell what you think....