The Student Room » Maths

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This section of The Student Room is a place for Maths and statistics discussion, revision, exam and homework help.

The Student Room » Maths

8h ago

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I'm just wondering if anyone can help with this question
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1 hour ago 1 hour ago
To find scale factor:you would normally do x^2-4/3(x-2). But if you focus on x^2-4/3(x-2) , x^2 divided by x = x and -4 divided by -2 = POSITIVE 2. So the scale factor would be x 2/3.To find area expression: you would do 9 multiplied x 2/3 (scale factor) SQAURED = 9 X (x 2)^2/9. Then the 9s cancel out as they are common =(x 2)^2. (x 2)^2 is tells us the are but the area wants the expression (x^2 4x 4). So the next step we would do is expand the brackets as (x 2)^2 = (x 2)(x 2). (x 2 ..read more

The Student Room » Maths

10h ago

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increasing functions using discriminant of first derivitive.
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36 minutes ago 36m ago
Quote:
Originally Posted by sigmagrindset49
The derivative of the cubic represents its gradient, and the derivative is a quadratic.
If I assume the cubic is a positive cubic, then it's derivative is a positive quadratic. So the derivative will be "U" shaped. Therefore the gradient come down from infinity, comes down to a minimum, then goes back up to infinity.
The discriminant is used to tell us exactly how far down this positive quadratic goes. A positive discriminant me ..read more

The Student Room » Maths

10h ago

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AS Edxcel Maths Practise Paper 2023
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1 hour ago 1 hour ago
Hi,
A Year 12 maths student here.
At GCSE there were many predicted papers and youtube videos,is there anything similar at year 1/AS Maths.I've done the old spec and current Edexcel ,AQA and OCR questions on physics and maths tutor.
Is there anything you would recommend ?
*Edexcel ..read more

The Student Room » Maths

13h ago

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Help - I don't understand significance levels
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1 minute ago now
Quote:
Originally Posted by leoishush
Attachment 1071381
is this right then?
Yes ..read more

The Student Room » Maths

13h ago

Thread Starter
Help mechanics
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1 minute ago now
going up is positive as hi=eight increases going down is negative as height above ground decreases ..read more

The Student Room » Maths

13h ago

Thread Starter
Help mechanics
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21 minutes ago 21m ago
Help I don’t understand why for part b they did the velocity equal to zero how does that show p changing??
Also the writing on the page is from the ms ..read more

The Student Room » Maths

14h ago

Thread Starter
Foundation maths
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9 minutes ago 9m ago
2 to 5 GCSE maths foundation tier? Possible ..read more

The Student Room » Maths

14h ago

Thread Starter
A-level maths help!
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22 minutes ago 22m ago
Quote:
Originally Posted by skyeforster15
34.4N
It's in equilibrium ie no resultant force.
On a slope it's really 'the norm' to consider directions perpendicular and parallel to the plane ..read more

The Student Room » Maths

15h ago

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Help mechanics
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31 minutes ago 31m ago
Quote:
Originally Posted by Alevelhelp.1
Which equation do I use for this question the correct answer is circled
s = 1.85
u = 0
v = unknown
a = to be found
t = 1.5
So which suvat equation involves s, u, a and t ..read more

The Student Room » Maths

17h ago

Thread Starter
Edexcel Mechanics A level question - Mock set 3
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19 minutes ago 19m ago
Quote:
Originally Posted by tiny hobbit
I agree with the mark scheme. a=(6t-2)i + 4j so v = (3t^2-2t + c)i + (4t + d)j and we have the initial velocity for finding c and d.
Thank you. I can see where my working was flawed ..read more