# Difference between revisions of "Manuals/calci/LUCAS"

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− | <div style="font-size:30px">'''LUCAS( | + | <div style="font-size:30px">'''LUCAS (NumberUpto)'''</div><br/> |

− | *<math> | + | *<math>NumberUpto</math> is the number indicating the position. |

+ | **LUCAS(),returns the sum of its two immediate previous terms. | ||

==Description== | ==Description== | ||

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*Lucas numbers are similar to the Fibonacci numbers. | *Lucas numbers are similar to the Fibonacci numbers. | ||

*It is generated by added the last two numbers in the series. | *It is generated by added the last two numbers in the series. | ||

− | *In <math>LUCAS( | + | *In <math>LUCAS(NumberUpto)</math>, <math>NumberUpto</math> is the numbers position, which is used to displaying the numbers in the given range. |

*The difference between Lucas and Fibonacci numbers are with the first two terms <math>L_0=2</math> and <math>L_1=1 </math>, but <math>F_0=0</math> and <math>F_1=1</math>. | *The difference between Lucas and Fibonacci numbers are with the first two terms <math>L_0=2</math> and <math>L_1=1 </math>, but <math>F_0=0</math> and <math>F_1=1</math>. | ||

− | *The Lucas numbers are defined by: <math>L_n=\begin{ | + | *The Lucas numbers are defined by: |

− | + | <math>L_n=\begin{Bmatrix} 2 & if & n=0 \\ | |

− | + | 1 &if & n=1 \\ | |

− | + | L_{n-1}+L_{n-2} &if & n>1 | |

− | + | \end{Bmatrix}</math> | |

*The sequence of Lucas numbers is 2,1,3,4,7,11,18,29.... | *The sequence of Lucas numbers is 2,1,3,4,7,11,18,29.... | ||

*The relation between Lucas and Fibonacci numbers are: | *The relation between Lucas and Fibonacci numbers are: | ||

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<math> F_n=\frac{L_{n-1}+L_{n+1}}{5}</math> | <math> F_n=\frac{L_{n-1}+L_{n+1}}{5}</math> | ||

where <math>L</math> is the Lucas series with <math> L_n</math> is the <math>n^{th}</math> Lucas number and <math> F_n </math> is the <math>n^{th}</math> Fibonacci number. | where <math>L</math> is the Lucas series with <math> L_n</math> is the <math>n^{th}</math> Lucas number and <math> F_n </math> is the <math>n^{th}</math> Fibonacci number. | ||

− | This function will, give the result as error when <math> | + | This function will, give the result as error when <math>NumberUpto</math> is non-numeric or NumberUpto < 0 |

==Examples== | ==Examples== | ||

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==References== | ==References== | ||

[http://en.wikipedia.org/wiki/Lucas_number LUCAS] | [http://en.wikipedia.org/wiki/Lucas_number LUCAS] | ||

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+ | *[[Z_API_Functions | List of Main Z Functions]] | ||

+ | |||

+ | *[[ Z3 | Z3 home ]] |

## Latest revision as of 17:26, 25 June 2018

**LUCAS (NumberUpto)**

- is the number indicating the position.
- LUCAS(),returns the sum of its two immediate previous terms.

## Description

- This function gives the Lucas series of the numbers.
- Lucas numbers are similar to the Fibonacci numbers.
- It is generated by added the last two numbers in the series.
- In , is the numbers position, which is used to displaying the numbers in the given range.
- The difference between Lucas and Fibonacci numbers are with the first two terms and , but and .
- The Lucas numbers are defined by:

- The sequence of Lucas numbers is 2,1,3,4,7,11,18,29....
- The relation between Lucas and Fibonacci numbers are:

and : where is the Lucas series with is the Lucas number and is the Fibonacci number.

This function will, give the result as error when is non-numeric or NumberUpto < 0

## Examples

- =LUCAS(5) = 2 1 3 4 7 11
- =LUCAS(0) = 2
- =LUCAS(1) = 2 1
- =LUCAS(3) = 2 1 3 4
- =LUCAS(-1) = Null

## Related Videos

## See Also

## References