Question 175097
Use this recursive formula to find the first four terms of the sequence.

{A1=4
{an= an-1=3

*you have to kinda of see the problem to really understand what i'm typing.
<pre><font size = 4 color = "indigo"><b>
You made a typo. You typed an equal sign 
when you should have typed either a plus +
or a minus -.

If the second equal sign was supposed to be a +, and you meant

{{{system(matrix(1,3,a[1],"=",4),matrix(1,4,a[n] = a[n-1],"","+",3))}}}

Then for {{{n=1}}}, you just put down {{{a[1]=4}}} from the first equation

Then for {{{n=2}}} you have {{{a[2] = a[2-1]+3 = a[1]+3 = 4+3 = 7}}}

Then for {{{n=3}}} you have {{{a[3] = a[3-1]+3 = a[2]+3 = 7+3 = 10}}}

Then for {{{n=4}}} you have {{{a[4] = a[4-1]+3 = a[3]+3 = 10+3 = 13}}}

First four terms are 4,7,10,13
----------------

If the second equal sign was supposed to be a -, and you meant

{{{system(matrix(1,3,a[1],"=",4),matrix(1,4,a[n] = a[n-1],"","+",3))}}}

Then for {{{n=1}}}, you just put down {{{a[1]=4}}} from the first equation

Then for {{{n=2}}} you have {{{a[2] = a[2-1]-3 = a[1]-3 = 4-3 = 1}}}

Then for {{{n=3}}} you have {{{a[3] = a[3-1]-3 = a[2]-3 = 1-3 = -2}}}

Then for {{{n=4}}} you have {{{a[4] = a[4-1]-3 = a[3]-3 = -2-3 = -5}}}

First four terms are 4,1,-2,-5

Edwin</pre>