Mathematics: Post your doubts here!

[ahmadumar]

The whole question please...

 

[ahmadumar]

and for the last part, in one complete circle its 360 degrees. and in similar triangles the corresponding angles remain the same. thus 360 is divided by the angle we calculated in d(i) i.e. 18.4

 

[Atharva Joshi]

sorry for late reply and not answering. hope ur test went well. and if u still want solutions for these lemme know

Yes I would appreciate that!

 

[ahmadumar]

Yes I would appreciate that!

for the first paper, if u could do (a) for Q10 then (b) part is nothing. u found n in (a) part. now use that to find dots of the different numbers and add up.

 

[ahmadumar]

Yes I would appreciate that!

and for the second paper i think u need to make two simultaneous equations. so first put n=3. Thus the Right Hand Side (RHS) will be equal to 14. u'll get an equation of a and b. then put n=4 and this time the RHS will be equal to 30. u'll get another equation in terms of a and b. solve both simultaneously and u'll get the values
any problem lemme know

 

[Atharva Joshi]

and for the second paper i think u need to make two simultaneous equations. so first put n=3. Thus the Right Hand Side (RHS) will be equal to 14. u'll get an equation of a and b. then put n=4 and this time the RHS will be equal to 30. u'll get another equation in terms of a and b. solve both simultaneously and u'll get the values
any problem lemme know

Are we supposed to use the cubic sequence formula? an^3+bn^2+cn+d

 

[Myaaa_20]

and for the last part, in one complete circle its 360 degrees. and in similar triangles the corresponding angles remain the same. thus 360 is divided by the angle we calculated in d(i) i.e. 18.4

Thanks a lot... You've been of great help

 

[Shada Mohammed]

I have doubt in oct/nov 08 paper4 question 6 part a ii

 

[Saad the Paki]

and for the last part, in one complete circle its 360 degrees. and in similar triangles the corresponding angles remain the same. thus 360 is divided by the angle we calculated in d(i) i.e. 18.4

I get n=19 but marking scheme says its n=20

 

[ahmadumar]

I get n=19 but marking scheme says its n=20

its 19..something i think.
however i will have a look at it again as soon as i get free

 

[Saad the Paki]

I need help in sequences please..!
A sequence is given : 4,12,24,40..... find the nth term
Is there any specific way of doing it? Any help will be appreciated.

 

[ahmadumar]

I need help in sequences please..!
A sequence is given : 4,12,24,40..... find the nth term
Is there any specific way of doing it? Any help will be appreciated.

this is from the maths formula booklet for A levels
hopefully it will help u.

 

[Saad the Paki]

this is from the maths formula booklet for A levels
hopefully it will help u.

But i believe that the above sequence is neither arithmetic nor geometrical... so the formulas cannot be applied :/

 

[maha atif]

But i believe that the above sequence is neither arithmetic nor geometrical... so the formulas cannot be applied :/

its a quadratic sequence . quadratic sequence is when the common difference comes to the second level.
ive uploaded some images showing the working . hope it helps.

 

[Saad the Paki]

its a quadratic sequence . quadratic sequence is when the common difference comes to the second level.
ive uploaded some images showing the working . hope it helps.

Nice.. Thanks alot..!
What type of a sequence is this one : 3,6,7,-2? Can i use the same formula here aswell? .... Sorry if i seem annoying...Sequences are my weak point

 

[sohaib ul haq]

why did not we minus 0.05 from 0.3 liters

plz need help today tomorrow is my mock exam


markscheem answer : 70
paper 21 winter 2012 0580

 

[maha atif]

Nice.. Thanks alot..!
What type of a sequence is this one : 3,6,7,-2? Can i use the same formula here aswell? .... Sorry if i seem annoying...Sequences are my weak point

ur welcome, its ok even i hate sequences.... yes u can use the same method . btw are these from past papers?
and if u get any information about ict practical p2 and p3 , variant 22 and 32 plsssss do let me know . i have it on 23 and 27 april

 

[sohaib ul haq]

why did not we minus 0.05 from 0.3 liters

plz need help today tomorrow is my mock exam


markscheem answer : 70
paper 21 winter 2012 0580
View attachment 51557


plz anyone help me out have no time


your explanation meen to me alot

 

[maha atif]

why did not we minus 0.05 from 0.3 liters

plz need help today tomorrow is my mock exam


markscheem answer : 70
paper 21 winter 2012 0580
View attachment 51557


plz anyone help me out have no time


your explanation meen to me alot

25-0.5=24.5 , 25+0.5=25.5
0.3-0.05=0.25 , 0.3+0.05=0.35
24.5/0.25=98
24.5/0.35=70
25.5/0.25=102
25.5/0.35=72.86
the lowest is 70 so it is the answer
at times u have to calculate all and look for the lowest.
hope it helps. Cheers!

 

[Saad the Paki]

Remember these rules