- Thread starter
- #1

#### sweatingbear

##### Member

- May 3, 2013

- 91

- Thread starter sweatingbear
- Start date

- Thread starter
- #1

- May 3, 2013

- 91

- Feb 13, 2012

- 1,704

The calculus demonstrates that the area...

$\displaystyle A = \int_{1}^{\infty} \frac{dx}{x} = \infty$ (1)

...and the volume of its the solid of revolution is finite and is...

$\displaystyle V= \pi\ \int_{1}^{\infty} \frac{dx}{x^{2}} = \pi$ (2)

It may seem incredible but this 'paradox' was discovered by Pappo di Alessandria in the fourth century after Christ [!]...

Kind regards

$\chi$ $\sigma$

- Admin
- #3

- Thread starter
- #4

- May 3, 2013

- 91

Thank you both for your replies.