Mathematics: Post your doubts here!

[robinhoodmustafa]

Part 2 .Lil Confuse . Please do the solution on paper and post the snapshot here.

and Part 3

Suchal Riaz

 

[Ayeshak93]

Need help with the circled questions..

 

[daredevil]

the thing that's confusing me here is that after differentiating we get t=100 ...
isn't t=100 the time at which the speed is max?
in the ms they have considered it to be the the time taken for the distance AB travelled.... it's confusing me to bits!!:/

and umm well solve the rest of the questoin too if u can

 

[daredevil]

Need help with the circled questions..

??

 

[Suchal Riaz]

Part 2 .Lil Confuse . Please do the solution on paper and post the snapshot here.

and Part 3

Suchal Riaz

 

[Ayeshak93]

??

I uploaded the picture after a minute or so..

 

[sitooon]

View attachment 39978

the thing that's confusing me here is that after differentiating we get t=100 ...
isn't t=100 the time at which the speed is max?
in the ms they have considered it to be the the time taken for the distance AB travelled.... it's confusing me to bits!!:/

and umm well solve the rest of the questoin too if u can

Did you open the bracket when differetiating ? you should do that !

 

[Ayeshak93]

I uploaded the picture after a minute or so..

 

[David Hussey]

that amazing moment when you do a p3 question correctly :')

 

[daredevil]

Did you open the bracket when differetiating ? you should do that !

yeah i did get the right answer... it was t=100

what i'm asking is that is t=100 the time when the particle reaches B??
shouldn't 100 be the time when the speed is max??

 

[A star]

that amazing moment when you do a p3 question correctly :')

when you do a complex no question its doubled

 

[daredevil]

when you do a complex no question its doubled

Praise the Lord...! :')

EDIT: May I encounter that same feeling very soon... preferably on 13th May too 0

 

[David Hussey]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_32.pdf
q3
what the heck is this??

 

[David Hussey]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_32.pdf
q3
what the heck is this??

 

[David Hussey]

when you do a complex no question its doubled

for me it would be differential equation or vectors or trig quesiton

 

[daredevil]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s13_qp_32.pdf
q3
what the heck is this??

rearrange the equation such that it is in the form:
lny = lnA - kx^2
-->
lny = -kx^2 + lnA

from this u can see that ur gradient will be -k and ur y-intercept is lnA

find the gradient using the coordinates of the two given points and equate it to -k .... then put in the values of lny , k, and x^2 from one of the points in the equation and find c i.e. lnA

got it?

 

[sitooon]

yeah i did get the right answer... it was t=100

what i'm asking is that is t=100 the time when the particle reaches B??
shouldn't 100 be the time when the speed is max??

when we differtiate equation we get Velocity equation
so to find time when V=0 , we equate zero with the equation of velocity , so we get t=0 & t=100
question says clearly v=0 , when start at rest and when reach B , read the question , so 0 is time at A , and 100 is time at B

 

[sitooon]

Whats we do when they say " e straight line through P parallel to the x-axis "

example: http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_31.pdf

 

[robinhoodmustafa]

rearrange the equation such that it is in the form:
lny = lnA - kx^2
-->
lny = -kx^2 + lnA

from this u can see that ur gradient will be -k and ur y-intercept is lnA

find the gradient using the coordinates of the two given points and equate it to -k .... then put in the values of lny , k, and x^2 from one of the points in the equation and find c i.e. lnA

got it?

X^2 + 5X = 8 in the form of (ax^2 +bx) +C
Pls help.

 

[David Hussey]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s13_qp_32.pdf
guys for q5 is the answer
(y^2+3x)/6X=a
(id understand ms language -__- )