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Then to find their nature, I find a point either side of each value... When x = 0 So x = -1, y' = 7 and x = 1, y' = 5 I don't think this is right!

Sorry!

Yes, Sorry... I didn't know how to do it in latex... Ok good... :)

Hello All... 'Consider the curve given by y = 2x^3 - \frac{1}{2}x^2 where -2\le x \le 5.' 'a) Find the stationary points and determine their nature'. I've got the two stationary points at x = 0 and x = 1/6... But something I'm doing is wrong from there... Thanks for your help in advance. :)

Sorry didn't see this reply!! I don't know think I should need to know it for 2U... Do you? :)

Yes, I do.... I've double checked it... I realise it only has one x intercept due to the position of the cubic. Thanks. :D

Hello All... How do I find the x intercept for y = 2x^3 + 3x^2 - 12x + 8 Then to find the intercept I've put y = 0... OR? Thanks heaps :D

Thanks ... :D

I have now got the answers!! :)

Thanks heaps.... :D 1a) X and Y are points on two parabolas. 2a) point lies on the hypotenuse. b) Use the area of a triangle formula...

Thanks. :D

Thanks all!

Hello All... Could someone please help me with the following? :D 1. 'A 3m piece of wire is cut into two pieces and bent around to form a square and a circle. Find the size of the two lengths, correct to 2 d.p., that will make the total area of the square and circle a minimum' AND 2...

Hello All... Not sure how to do the following: "X is a point on the curve y = x^2 - 2x + 5 . Point Y lies directly below X and is on the curve y = 4x - x^2 ." a) Show that the distance d between X and Y is given by d = 2x^2 - 6x + 5 . b) Find the minimum distance between X and Y...

Hello All... :D Could someone please help me with the following? 'A function has f'(1) = 3 and f(1) = 5. Evaluate f(-2) given f''(x) = 6x + 18.' Thanks in advance. :)

Hello All... Can you please help me with the following question? A poster consists of a photograph bordered by a 5cm margin. The area of the poster is to be 400 cm^2 . I know the area of the photograph is given by the equation A = 500 - 10x - \frac{4000}{x} . But how do I find the...

Thanks!

Which comes too: 2\pi r^2 + \frac{108\pi}{r}

BTW - How do I get Pi in latex?

Hello All... Could someone please help me with the following question? "The formula for the surface area of a cylinder is given by S = 2\pi r (r + h) ,where r is the radius of its base and h its height. Show that if the cylinder holds a volume of 54\pi m^3 , the surface area is given...