The Student Room Group
Uni students - Complete our survey >>
Uni students - Complete our survey >>
Uni students - Complete our survey >>

Maths Paper 1 help needed:)

I m doing CAIE past papers please reach out at me if you have solved Paper 1- Variant 1 Summer 2019? Please emergency
If you put the question you’re stuck on in the forum people can try to guide you
Original post by Samavi16
I m doing CAIE past papers please reach out at me if you have solved Paper 1- Variant 1 Summer 2019? Please emergency

Post the question.
Reply 3
Avatar for Samavi16
Samavi16
OP
13
2CEAC41F-4CA9-4B5F-8C17-7062DC8CAD54.jpg.jpeg
This I can’t understand how to attempt it
the image is not clear, but it is about a line meeting a curve as a tangent.

here is a similar example:

y = ax + b

y = x2 - 3x - 1

where they meet we can say

x2 - 3x - 1 = ax + b

which rearranges to give

x2 -3x -ax -1-b = 0

for a tangent this must have only one (repeated) root....
Reply 5
Avatar for Samavi16
Samavi16
OP
13
It s screenshot
89D4E5FB-472E-4AF8-A9ED-AE78D2E52EAE.jpg.jpeg14.2KB
Reply 6
Avatar for Samavi16
Samavi16
OP
13
The line 4y=x+c ,where c is a constant,is a tangent to the curve y^2 =x+3 at the point P on the curve.
(i) Find the value of c.
Reply 7
Avatar for davros
davros
16
Original post by Samavi16
The line 4y=x+c ,where c is a constant,is a tangent to the curve y^2 =x+3 at the point P on the curve.
(i) Find the value of c.

Have you looked at the example given by the bear above and tried to follow the logic?
Reply 8
Avatar for Samavi16
Samavi16
OP
13
Original post by davros
Have you looked at the example given by the bear above and tried to follow the logic?


But it s inverse and the marking scheme states that I should use quadratics? I m trying I think I made a mistake
Reply 9
Avatar for davros
davros
16
Original post by Samavi16
But it s inverse and the marking scheme states that I should use quadratics? I m trying I think I made a mistake

What do you mean by "inverse"?

It's an example of a line being tangent to a curve and leads to a quadratic equation, and that requirement implies a certain condition on the roots of the quadratic.
Reply 10
Avatar for Samavi16
Samavi16
OP
13
I m thinking of another question I m sorry
Reply 11
Avatar for davros
davros
16
Original post by Samavi16
I m thinking of another question I m sorry

So have you managed to sort out the question involving the line being tangent to the curve?
Reply 12
Avatar for Samavi16
Samavi16
OP
13
Yes thank you for the help

Quick Reply

Related discussions

Latest

Trending

Trending

Articles for you