![Classical Means](/sites/default/files/styles/medium/public/thumbnails/content-id-6593-icon.jpg?itok=SDCzMlga)
Arithmetic, geometric and harmonic means
![Classical Means](/sites/default/files/styles/medium/public/thumbnails/content-id-6593-icon.jpg?itok=SDCzMlga)
![AMGM](/sites/default/files/styles/medium/public/thumbnails/content-01-04-six4-icon.gif?itok=mFgf3mKb)
![Three Ways](/sites/default/files/styles/medium/public/thumbnails/content-01-10-15plus2-icon.png?itok=A9Kgij7g)
problem
Three Ways
If x + y = -1 find the largest value of xy by coordinate geometry, by calculus and by algebra.
![Pythagorean Golden Means](/sites/default/files/styles/medium/public/thumbnails/content-01-05-15plus2-icon.gif?itok=xcZp8QtW)
problem
Pythagorean Golden Means
Show that the arithmetic mean, geometric mean and harmonic mean of
a and b can be the lengths of the sides of a right-angles triangle
if and only if a = bx^3, where x is the Golden Ratio.
![Without Calculus](/sites/default/files/styles/medium/public/thumbnails/content-01-03-15plus2-icon.jpg?itok=qHSfj9VF)
problem
Without Calculus
Given that u>0 and v>0 find the smallest possible value of
1/u + 1/v given that u + v = 5 by different methods.
![Mean Geometrically](/sites/default/files/styles/medium/public/thumbnails/content-99-03-15plus3-icon.jpg?itok=-teTe-bW)
problem
Mean Geometrically
A and B are two points on a circle centre O. Tangents at A and B cut at C. CO cuts the circle at D. What is the relationship between areas of ADBO, ABO and ACBO?
![About Pythagorean Golden Means](/sites/default/files/styles/medium/public/thumbnails/content-01-07-art3-icon.gif?itok=G8tldIT1)
article
About Pythagorean Golden Means
What is the relationship between the arithmetic, geometric and
harmonic means of two numbers, the sides of a right angled triangle
and the Golden Ratio?