Multiplication by 2 over 3 in Egyptian Fractions/Examples/1 over 8

From ProofWiki
Jump to navigation Jump to search

Example of Use of Multiplication by 2 over 3 in Egyptian Fractions

$\dfrac 2 3 \times \dfrac 1 8 = \dfrac 1 {16} + \dfrac 1 {48}$

despite the fact that it is apparent that:

$\dfrac 2 3 \times \dfrac 1 8 = \dfrac 1 {12}$


Proof

\(\ds \dfrac 1 {16} + \dfrac 1 {48}\) \(=\) \(\ds \dfrac 1 {2 \times 8} + \dfrac 1 {6 \times 8}\)
\(\ds \) \(=\) \(\ds \dfrac 3 {6 \times 8} + \dfrac 1 {6 \times 8}\)
\(\ds \) \(=\) \(\ds \dfrac 4 {6 \times 8}\)
\(\ds \) \(=\) \(\ds \dfrac 2 {3 \times 8}\)
\(\ds \) \(=\) \(\ds \dfrac 2 3 \times \dfrac 1 8\)

$\blacksquare$


Sources