Skip to main content
1-Visitor
September 20, 2015
Solved

Need help in using Mathcad

  • September 20, 2015
  • 2 replies
  • 2080 views

A sequence Ln is such that L1 = 0.2, L2 = 0.1 and

Ln = 2Ln-1 - 1.5Ln-2      ( n >= 3 )


Use Mathcad to determine the value of L43, giving your answer to 2 decimal places.


Need help to input this into Mathcad as i am new to this software... Thxs...

This is under which tutorial in Mathcad?

Best answer by StuartBruff

Kok Kiang Lian wrote:

A sequence Ln is such that L1 = 0.2, L2 = 0.1 and

Ln = 2Ln-1 - 1.5Ln-2      ( n >= 3 )


Use Mathcad to determine the value of L43, giving your answer to 2 decimal places.


Need help to input this into Mathcad as i am new to this software... Thxs...

This is under which tutorial in Mathcad?

You will need to look for help about "range variables", plus basic expression entry and editing.  Here's an example of how to create a similar sequence

Stuart

2 replies

23-Emerald V
September 21, 2015

Kok Kiang Lian wrote:

A sequence Ln is such that L1 = 0.2, L2 = 0.1 and

Ln = 2Ln-1 - 1.5Ln-2      ( n >= 3 )


Use Mathcad to determine the value of L43, giving your answer to 2 decimal places.


Need help to input this into Mathcad as i am new to this software... Thxs...

This is under which tutorial in Mathcad?

You will need to look for help about "range variables", plus basic expression entry and editing.  Here's an example of how to create a similar sequence

Stuart

25-Diamond I
September 22, 2015

Maybe you'd like zo create a function to get the n-th element of the series.

As you can see, the most obvious implementation (recursion) also is the most inefficient one.