Scroll to see replies
Original post by otrivine
x = t + (1/t) , y = t - (1/t)
is this a correct equation
y=x-2 ?
is this a correct equation
y=x-2 ?
Absolutely not.
Try finding x+y and x-y.
Original post by otrivine
what I did was
x=1 +(1/t) I multiplied by t so that it gives x= t2 + 1 ?
x=1 +(1/t) I multiplied by t so that it gives x= t2 + 1 ?
Why? And why do you think it gives that?
I have told you how to proceed.
Original post by Mr M
Why are you randomly multiplying one side of an equation by t?
I have told you how to proceed.
I have told you how to proceed.
Yep I got it
so x+y
so x+y=2t and t= (x+y)/2 and then sub to either x or y >?
Original post by otrivine
what I did was
x=1 +(1/t) I multiplied by t so that it gives x= t2 + 1 ?
x=1 +(1/t) I multiplied by t so that it gives x= t2 + 1 ?
On a side note, if you did multiply out by t, you did the RHS fine but not the LHS. x multiplied by t is xt
Original post by otrivine
Yep I got it
so x+y
so x+y=2t and t= (x+y)/2 and then sub to either x or y >?
so x+y
so x+y=2t and t= (x+y)/2 and then sub to either x or y >?
Just find the product of (x+y)(x-y) and no substitution is required.
Original post by PhysicsGal
On a side note, if you did multiply out by t, you did the RHS fine
Are you sure?
Original post by PhysicsGal
On a side note, if you did multiply out by t, you did the RHS fine but not the LHS. x multiplied by t is xt
But in the example in the book
y= 3+2(2-x/x+3)
____________ they mutlpied by x+3 to get rid of it and they did not
1+(2-x/x+3) multiply the y with x+3 ?
Original post by Mr M
Just find the product of (x+y)(x-y) and no substitution is required.
oh ok, thanks!
one other question please Mr M
x=t2-1 , y= t-t3
for -2<equal t <equal to 2
In the book to get the limits in terms of t , they used x=-1 and x= 0 why?
Original post by otrivine
But in the example in the book
y= 3+2(2-x/x+3)
____________ they mutlpied by x+3 to get rid of it and they did not
1+(2-x/x+3) multiply the y with x+3 ?
y= 3+2(2-x/x+3)
____________ they mutlpied by x+3 to get rid of it and they did not
1+(2-x/x+3) multiply the y with x+3 ?
Can you use brackets or, better still, LaTex?
Is it possible to scan this example as you are seem to have a fairly horrific misconception?
If it was possible just to arbitrarily multiply one side of an equation by something you could do stuff like this.
Multiply the right hand side by 2.
(edited 11 years ago)
In any event and this is what you typed in post 4.
Original post by Mr M
Are you sure?
Of course not
xt = t + 1/t^2
Edit: Happy April Fool's!! Bwahahahaa....
As we all know, x*t = xt
Thus (t + 1/t)*t = t^2 + t/t = t^2 + 1
Au revoir.
(edited 11 years ago)
Original post by PhysicsGal
Of course not
xt = t + 1/t^2
xt = t + 1/t^2
That isn't right either but the matter is confused by the fact that otrivine copied down the original question incorrectly in post 4. Never mind.
Original post by Mr M
That isn't right either but the matter is confused by the fact that otrivine copied down the original question incorrectly in post 4. Never mind.
Sorry, I'm trying to be helpful whilst trying to learn how to write French letters...clearly neither is happening well :/
And fair do's, looks like you're giving sound advice anyhow
Original post by PhysicsGal
trying to learn how to write French letters...
3D printer?
Original post by Mr M
3D printer?
LOL!!
I should've seen that one arriving my way :P Obviously, I meant actual letters written to people living in France, clearly
Original post by otrivine
this one
The book multiplied the right hand side by (x+3)/(x+3).
Now 5/5 = 1, and x/x = 1, anything divisible by itself = 1, thus (x+3)/(x+3) = 1.
So if we multiply the LHS by this 'fraction', we get y multiplied by (x+3)/(x+3) = y multiplied by 1 = y
Quick Reply
Related discussions
- m1 mechanics as vectors 2018 internation edexcel q6
- polar coordinate question help
- Need help on log question urgent, mock exam tomorrow
- desmos
- Polar coordinates: r = 1/(1+2costheta)
- Cartesian Equations-finding arc length
- Cartesian Equations
- Cartesian Equations
- help needed please
- Edexcel AS further maths - Core Pure 1 (15th May 2023)
- Cartesian Equations-domain and range
- Help super duper urgent maths 😭😭😭😭😭📚
- Vectors help plz
- HNC Math trig question
- Engineering complex numbers + trig help
- AQA A-level Further Mathematics Paper 1 (7367/1) - 25th May 2023 [Exam Chat]
- OCR MEI Further Maths Core Pure - 25 May 2023
- OCR A-level Mathematics A Paper 1 (H240/01) - 6th June 2023 [Exam Chat]
- Further Mechancis Impulse question
- Reincarnation is inevitable and infinite
Latest
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
Trending
Last reply 2 days ago
Did Cambridge maths students find maths and further maths a level very easy?Last reply 2 weeks ago
Edexcel A Level Mathematics Paper 2 unofficial mark scheme correct me if wrongMaths
71
