When I saw 'lightweight AS' I thought I might be able to do it using what I've learnt in additional maths... I was mistaken. Any clues on how to solve it?(Using some guesswork based on what the graph looks like I have y=0.136x+0.0176 which seems to be closeish)

Reply 6

username1732133

OP

15

No clues just yet. All I will say is that when find the right approach it will be easy.

Posted from TSR Mobile

Reply 7

qwertzuiop

2

Original post by Lelanor

When I saw 'lightweight AS' I thought I might be able to do it using what I've learnt in additional maths... I was mistaken. Any clues on how to solve it?(Using some guesswork based on what the graph looks like I have y=0.136x+0.0176 which seems to be closeish)

You know the original function, the gradient function, and that the tangent touches the curve twice. Setting up a set of simultaneous equations could be a start.

Reply 8

Kvothe the Arcane

20

Will try this. Can you hold on?

Reply 9

qwertzuiop

2

Right then, I have spent enough time on this.
The best I can do is y=0.12x + 0.025, but it uses the diagram, something I was hoping to avoid using my simultaneous equations.

My conclusion: this isn't a "lightweight" problem particularly.

(edited 8 years ago)

Reply 10

Kvothe the Arcane

20

Original post by qwertzuiop

Right then, I have spent enough time on this.
The best I can do is y=0.12x + 0.025, but it uses the diagram, something I was hoping to avoid using my simultaneous equations.

My conclusion: this isn't a "lightweight" problem particularly.

It's just algebra. I've just started. Hopefully I'm done in 20 minutes :tongue:

. It will be so embarrassing if I get it wrong as I've done more maths than you, probably.

Reply 11

TeeEm

19

this is an excellent question!!
(sorry that I am about to steal it, as I am about to write a neat detailed solution for one of my papers, but will not post it)

Reply 12

username1732133

OP

15

No problem.

Posted from TSR Mobile

Reply 13

qwertzuiop

2

Original post by keromedic

It's just algebra. I've just started. Hopefully I'm done in 20 minutes :tongue:

. It will be so embarrassing if I get it wrong as I've done more maths than you, probably.

What level are you at?
Clearly not at the pinnacle of your mathematical career if you claim a problem, which blatantly involves calculus, is purely algebraic.

The system of equations which can be established is algebraic however.

Good luck.

Reply 14

L-Tyrosine

2

How do you put a spoiler alert?

Reply 15

Lelanor

14

Original post by L-Tyrosine

How do you put a spoiler alert?

The face with an X over the mouth

Reply 16

Onlineslayer

11

Beautiful

(edited 8 years ago)

Reply 17

Kvothe the Arcane

20

Spoiler

Don't care if this is wrong. I cbb looking over that working.

(edited 8 years ago)

Reply 18

username1732133

OP

15

Original post by TeeEm

this is an excellent question!!
(sorry that I am about to steal it, as I am about to write a neat detailed solution for one of my papers, but will not post it)