This discussion is now closed.
Check out other Related discussions
- Oxford pat math problem
- A Level Maths Exam Question
- Differentiation help - points of inflection
- A country produces at a new point within its production possibility curve when:
- Trigonometry Revision
- A-level Maths, Integration, Finding area between curves & Lines.
- Differentiation
- equations of tangents and normals
- economics alevel graphs needed
- Convex and concave function
- A Level Maths Question (1)
- Implicit differentiation question
- hyperbolic function catenary problem
- Maths parametric integration
- Ideal and regular solutions question
- Chemistry F325- End Point/ Equivalence Point
- Low 2.2 in 2nd yr, can I get a 2.1/1st in 3rd yr?…
- When transforming a graph, does it matter which order you list the transformations?
- AS Maths Exponential Question
- Chemistry question help
Minimum Point On A Curve
how to find the minimum point of a curve. I know you have to complete the square but i dont understand how you find the minimum points.
E.g. x² - 8x + 23 = (x-a)² + b
(x-4)² + 7 = 0
so what would the minimum points be and how would you work it out
E.g. x² - 8x + 23 = (x-a)² + b
(x-4)² + 7 = 0
so what would the minimum points be and how would you work it out
Scroll to see replies
can you give a gcse answer plss
Rudeboy999
how to find the minimum point of a curve. I know you have to complete the square but i dont understand how you find the minimum points.
E.g. x² - 8x + 23 = (x-a)² + b
(x-4)² + 7 = 0
so what would the minimum points be and how would you work it out
E.g. x² - 8x + 23 = (x-a)² + b
(x-4)² + 7 = 0
so what would the minimum points be and how would you work it out
The minimum point will be when x = -4. You have to set the inside of the bracket to zero.
Sub x= -4 in to the original equation to find the value of the function at this point.
source: http://www.mathcentre.ac.uk/resources/workbooks/mathcentre/web-completingsquare1.pdf (section 4)
differentiate it and then put in 'o' as the dy/dx.
okay, sorry - i'm doing GCSE Additional maths - where calculus is REQUIRED, i've never done it in normal maths. So u do diffrentiate.
englishman129
okay, sorry - i'm doing GCSE Additional maths - where calculus is REQUIRED, i've never done it in normal maths. So u do diffrentiate.
Differentiate, set this equal to 0 to find stationary points.
Check values either side of any stationary points to see whether they are minimum or maximum
jonny23563
Differentiate, set this equal to 0 to find stationary points.
Check values either side of any stationary points to see whether they are minimum or maximum
Check values either side of any stationary points to see whether they are minimum or maximum
exactly.
englishman129
okay, sorry - i'm doing GCSE Additional maths - where calculus is REQUIRED, i've never done it in normal maths. So u do diffrentiate.
For this question, you can get the answer much more easily without calculus (although it would work too, it's just waaay longer)
It helps to imagine the curve, and the lowest point on that curve will be y=7 (due to the translation of the curve)
You can sub this value for y into the equation, and end up with a value for x
It is much faster/easier than calculus.
Edit: how many marks for this question? If it's just one or two, they won't be expecting you to differentiate.
this is at gcse level btw
assmaster
For this question, you can get the answer much more easily without calculus (although it would work too, it's just waaay longer)
It helps to imagine the curve, and the lowest point on that curve will be y=7 (due to the translation of the curve)
You can sub this value for y into the equation, and end up with a value for x
It is much faster/easier than calculus.
Edit: how many marks for this question? If it's just one or two, they won't be expecting you to differentiate.
It helps to imagine the curve, and the lowest point on that curve will be y=7 (due to the translation of the curve)
You can sub this value for y into the equation, and end up with a value for x
It is much faster/easier than calculus.
Edit: how many marks for this question? If it's just one or two, they won't be expecting you to differentiate.
BTW i'm not asking the question...i just responded saying you have to differentiate and i know how to do it. It's the original poster who dosen't lol - everyone keeps quoting me.
Rudeboy999
this is at gcse level btw
dude, i've never covered it in my normal maths syllabus, do you even have to?
englishman129
BTW i'm not asking the question...i just responded saying you have to differentiate and i know how to do it. It's the original poster who dosen't lol - everyone keeps quoting me.
I know sweetie, the OP will be watching the thread and will hopefully read what I said...
Also you don't have "Thread Starter" under your username
M_E_X
You never call me sweetie, yet this scrot gets it? 
*cries*
*cries*
awwwwww how upsetting
, i duno wot i even done to annoy you lol 
Related discussions
- Oxford pat math problem
- A Level Maths Exam Question
- Differentiation help - points of inflection
- A country produces at a new point within its production possibility curve when:
- Trigonometry Revision
- A-level Maths, Integration, Finding area between curves & Lines.
- Differentiation
- equations of tangents and normals
- economics alevel graphs needed
- Convex and concave function
- A Level Maths Question (1)
- Implicit differentiation question
- hyperbolic function catenary problem
- Maths parametric integration
- Ideal and regular solutions question
- Chemistry F325- End Point/ Equivalence Point
- Low 2.2 in 2nd yr, can I get a 2.1/1st in 3rd yr?…
- When transforming a graph, does it matter which order you list the transformations?
- AS Maths Exponential Question
- Chemistry question help
Latest
Trending
