Maths, Addmaths and Statistics: Post your doubts here!

[Mahnoorfatima]

No orientation means order of the shape i.e ABC,in reflection it might become ACB but in rotation it just changes it position and direction but not orientation,if we look at it from another angle it will still be ABC.

That's what I was trying to say. Right, thanks,

 

[***amd***]

What formulas do we need to know for sequences and patterns?

Like this question. Find the nth term of --> 3,6,10,15,21..

How do we find it? :/

u always have to derive one.

 

[asadalam]

It depends on the shape. If it's a square being reflected, then no change in orientation..
But if its a triangle with unequal sides or something, it will become laterally inverted.. That's for reflection!

But for rotation, it turns, depending on the angle of rotation.

yes but orientation i.e order remains same,thats the difference between reflection and rotation.

 

[Dark Destination]

u always have to derive one.

How? .-.

 

[DaniyalK]

http://papers.xtremepapers.com/CIE/Cambridge International O Level/Mathematics D (Calculator Version) (4024)/4024_s07_qp_2.pdf
Sec B q7 Aii. anyone?

Calculate the area of the 4 vertical faces. 2(20 * 4) + 2( 7*4) = 216 cm^2

 

[asadalam]

How? .-.

Use your thinking skills of course

 

[peacce]

Paper 2 :/ Don't we have paper 1 on monday?

yes its p1

 

[Dark Destination]

Use your thinking skills of course

3,6,10,15,21..

This is impossible! How can we do this? ^

 

[Dark Destination]

yes its p1

But you're doing paper 2

 

[DaniyalK]

How? .-.

https://sites.google.com/site/urbangeekclassroomsg/emath-classroom/number-sequences
this might help, courtesy of flrnab.

 

[FirstHippo]

Can anyone help me rearrange this formula step by step to make X the subject? I can't seem to do it and the answer key doesn't tell me how either

 

[peacce]

But you're doing paper 2

tu kia huwa

 

[Dark Destination]

Can anyone help me rearrange this formula step by step to make X the subject? I can't seem to do it and the answer key doesn't tell me how either

A/(y-2) ?

 

[peacce]

Can anyone help me rearrange this formula step by step to make X the subject? I can't seem to do it and the answer key doesn't tell me how either

oh yes wait a seec

 

[DaniyalK]

Can anyone help me rearrange this formula step by step to make X the subject? I can't seem to do it and the answer key doesn't tell me how either

xy = A + 2x
xy -2x = A
x(y-2) = A
x + A/(y-2)

 

[funky brat]

3,6,10,15,21..

This is impossible! How can we do this? ^

There's a formula, use that.
a+(n-1)d1
a is the first term of sequence and d is the common difference.

 

[asadalam]

3,6,10,15,21..

This is impossible! How can we do this? ^

Whats the year and question?

 

[Dark Destination]

https://sites.google.com/site/urbangeekclassroomsg/emath-classroom/number-sequences
this might help, courtesy of flrnab.

That's a big formula :/ For changing difference. Is this a part of our syllabus?

 

[peacce]

Can anyone help me rearrange this formula step by step to make X the subject? I can't seem to do it and the answer key doesn't tell me how either

 

[funky brat]

http://papers.xtremepapers.com/CIE/...(Calculator Version) (4024)/4024_s04_qp_1.pdf
question 26, can anyone help with it?