Mathematics: Post your doubts here!

[destined007]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

This was a question i encountered in our Co-ordinate geometry class . I found the co-ordinates of one vertex but equating the equations by there's no way except the graph work i think this can be solved !! It might seem easy to you guys but its given me a hell already !! :x

The equations of two sides of a square are y = 3x - 1 and x + 3y -6 = 0. If ( 0, -1) is one vertex of the square find the coordinates of the other vertices.

:: Core Maths 3rd Edition; Pg 91, Q 11.

Answers = ( 9/10 , 17/10 ) <-- Found it !!
Other two can be
Either ( -18/10 , 26/10 ) and ( -27/10 , -19/10 )
Or ( 36/10 , 8/10 ) and ( 27/10, -19/10) !!

 

[CaptainDanger]

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Lol at the ^^^ line!

 

[abcde]

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Could anyone quickly revise how synthetic division is done (preferably with an example)? Thanks.

 

[destined007]

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Could anyone quickly revise how synthetic division is done (preferably with an example)? Thanks.

http://www.youtube.com/watch?v=bZoMz1Cy1T4
explained quite well.

 

[VelaneDeBeaute]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

@Destined007 Thankyou !! But mera bhi to socho !! My hand actually died cuz of this question !! Btw the note really made me laugh...Chh Chh Poor you

 

[kronix6]

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question is . :O: The function f(x) = 1+bx + a has a maximum value of 4 where x= -1 . find the value of a and b. PLZ SOMEONE HELP ME IN THIS> REALLY NEED HELP. Can someone solve this and explain his steps and method plz. i will be very grateful. :sorry: :sorry: :sorry: :sorry: :sorry:

 

[destined007]

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question is . :O: The function f(x) = 1+bx + c has a maximum value of 4 where x= -1 . find the value of a and b. PLZ SOMEONE HELP ME IN THIS> REALLY NEED HELP. Can someone solve this and explain his steps and method plz. i will be very grateful. :sorry: :sorry: :sorry: :sorry: :sorry:

Where's 'a' in your question?

 

[destined007]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

@Destined007 Thankyou !! But mera bhi to socho !! My hand actually died cuz of this question !! Btw the note really made me laugh...Chh Chh Poor you

Welcome

 

[XPFMember]

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Assalamoalaikum!!

http://xtremepapers.com/CIE/Internation ... _qp_61.pdf

I'd like to know if I can do Q:6(iv) using this method:

6P3 x 6P1 = 720

gives the same answer but it isn't mentioned in the mark scheme?! is it ok to do this?!

JazakAllah Khair!

 

[destined007]

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see your solution doesn't show the arrangement of different colors by their quantity. like 2R 1B 1G etc.

 

[kronix6]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

question is . :O: The function f(x) = 1+bx + c has a maximum value of 4 where x= -1 . find the value of a and b. PLZ SOMEONE HELP ME IN THIS> REALLY NEED HELP. Can someone solve this and explain his steps and method plz. i will be very grateful. :sorry: :sorry: :sorry: :sorry: :sorry:

Where's 'a' in your question?

lol sorry that c is actually a. i wrote it wrong.

 

[XPFMember]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

see your solution doesn't show the arrangement of different colors by their quantity. like 2R 1B 1G etc.

aoa!!

Jazak Alllah Khair! I'll try doing it again today, InshaAllah. If I am unable to, then will ask you again! :unknown:

 

[kronix6]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

question is . :O: The function f(x) = 1+bx + c has a maximum value of 4 where x= -1 . find the value of a and b. PLZ SOMEONE HELP ME IN THIS> REALLY NEED HELP. Can someone solve this and explain his steps and method plz. i will be very grateful. :sorry: :sorry: :sorry: :sorry: :sorry:

Where's 'a' in your question?

the c is the a . my mistake .

 

[destined007]

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Q) f(x)= 1+ bx + ax^2 the maximum value is 4 where x= -1 find a and b.

y=1+bx+ax^2
when x=-1, y=4
4=1+b(-1)+a(-1)^2
3=-b+a-----(i)
b=a-3

differentiate the function
dy/dx= b+2ax
when y is max or min, dy/dx =0
In this case when x=-1, y is max
therefore, b+2a(-1)=0
b-2a=0-----(ii)

solve simultaneounly
b-2a=0
a-3-2a=0
-a-3=0
a=-3

b=a-3
b=-3-3
b=-6

 

[VelaneDeBeaute]

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Okay so last night i was doing some circular measure questions and this question was causing loads of problems :evil:

:: Core Maths, Chapter 10, Q 6 ( i ) ( l )

=> Write down, as a fraction of (pie), the possible values of x in the range 0 (less than and equal to ) x ( less than and equal to ) 2 pie.

~ sin x = -1/2
ans :: x = 7/6 pie, 11/6 pie

~sin x = - 1 / (under root) 2
ans :: x = 5/4 pie, 7/4 pie

P.S. If some has any link to any videos related to this chapter, do post em here. This was such a mess at school

 

[destined007]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

Okay so last night i was doing some circular measure questions and this question was causing loads of problems :evil:

:: Core Maths, Chapter 10, Q 6 ( i ) ( l )

=> Write down, as a fraction of (pie), the possible values of x in the range 0 (less than and equal to ) x ( less than and equal to ) 2 pie.

~ sin x = -1/2
ans :: x = 7/6 pie, 11/6 pie

~sin x = - 1 / (under root) 2
ans :: x = 5/4 pie, 7/4 pie

P.S. If some has any link to any videos related to this chapter, do post em here. This was such a mess at school

 

[destined007]

Re: Maths help available here!!! Stuck somewhere?? Ask here!

Okay so last night i was doing some circular measure questions and this question was causing loads of problems :evil:

:: Core Maths, Chapter 10, Q 6 ( i ) ( l )

=> Write down, as a fraction of (pie), the possible values of x in the range 0 (less than and equal to ) x ( less than and equal to ) 2 pie.

~ sin x = -1/2
ans :: x = 7/6 pie, 11/6 pie

~sin x = - 1 / (under root) 2
ans :: x = 5/4 pie, 7/4 pie

P.S. If some has any link to any videos related to this chapter, do post em here. This was such a mess at school

have a look at this:
viewtopic.php?f=26&t=10804
and
viewtopic.php?f=26&t=10873 (for further reference)

 

[1357913579]

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ploease help me solve this problem
the roof of a house has a rectangle base of side 4 metre by 8 metre. the ridge line of the roof is 6 metre long, and centered 1 metre above the base of the roof. calculate the acute angle between two opposite slanting edge of the roof

 

[kamina1]

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Done with partial fraction..dont know the next part..kindly guide me as it comes in every paper..!

 

[VelaneDeBeaute]

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^ LOL Why post so many times ? One would have got answered as well !! :crazy: