Mathematics: Post your doubts here!

[ZaqZainab]

ZaqZainab, do you know how to do that question (8b from Oct/Nov 2013 Paper 32)?

I am doing only AS

 

[Namehere]

Nevermind, now I know how to do it!

 

[SitiPutri]

??

View attachment 39008

Hope it's clear enough

 

[Thought blocker]

Hope it's clear enough

TY, So to calculate the equation of curve, we need to integrate the sum ? (I'am weak I Know )

 

[SitiPutri]

View attachment 39007

Here you goo

 

[Thought blocker]

Here you goo

ty

 

[Thought blocker]

Here you goo

explain answer iii...

 

[sitooon]

Nevermind, now I know how to do it!

Post the solution then there are many others waiting

 

[hamza.k143]

J

Lol, u r genius too. See my following doubt, how to find CD ?
View attachment 38962

u can do it another way break the triangle into half draw a straight line from O till cd and then solve it the angle 0.8 will break int 0.4 find adjacent of the triangle and multiply by 2

 

[SitiPutri]

TY, So to calculate the equation of curve, we need to integrate the sum ? (I'am weak I Know )

To find the equation of the curve, we have to integrate dy/dx. No, I found it hard as well! Just need lil bit of practice

explain answer iii...

Attached

 

[Thought blocker]

Here you goo

in part to why u took -1 ??

 

[Thought blocker]

To find the equation of the curve, we have to integrate dy/dx. No, I found it hard as well! Just need lil bit of practice



Attached

ty alot

 

[SitiPutri]

in part to why u took -1 ??

From (i), we know that x=-1 and x=3. To determine which one is maximum or minimum we can look at the curve. The max point has a negative x. So, the maximum point has to be the one with x=-1

 

[Thought blocker]

From (i), we know that x=-1 and x=3. To determine which one is maximum or minimum we can look at the curve. The max point has a negative x. So, the maximum point has to be the one with x=-1

ty

 

[periyasamy]

Here u go if u need any help regarding maths just mail me the questions

Thanks a lot mate.Sure mate.....Really appreciate it......

 

[Phoenix Blood]

Does anyone know how the "In" function used in the fx-991MS calculator? I'd known a really nice way of using that button-y. Forgot!

 

[Phoenix Blood]

eureka! ***amd*** Awesome12

 

[Suchal Riaz]

Nah, I´m doing both AS and A2 this summer.

i tried a lot to solve your question but i failed. so i asked math experts over here: http://math.stackexchange.com/quest...least-value-of-their-difference-needs-to-be-f
keep an eyes on that maybe somebody will help us out.

 

[Namehere]

i tried a lot to solve your question but i failed. so i asked math experts over here: http://math.stackexchange.com/quest...least-value-of-their-difference-needs-to-be-f
keep an eyes on that maybe somebody will help us out.

Here I attach my explanation (thanks to hamza.k143 who explained it to me):

My only remaining doubt is why or how do we know the line AB intersects at y= -1 (-i), because after that the rest is reasonably easy, its just that assumption I don´t get. So if anyone knows please let me know.

 

[Namehere]

Oops, I was supposed to attach this: