Question 1178668
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The statement<br>
a(n) = na(n-1)<br>
means that, for each integer n greater than 1, the n-th term is n times the previous term.<br>
Given a(1)=5, use that definition to find a(2); then use the definition again to find a(3).<br>
Here is an example if you don't understand that....<br>
a(1) = 4; a(n) = n*a(n-1)+1<br>
The second statement says to get the n-th term of the sequence you multiply the current term by n and add 1.<br>
given first term: 4
second term: multiply 1st term (4) by n (2) and add 1: 4(2)+1 = 9
third term: multiply second term (9) by n (3) and add 1: 9(3)+1 = 28
fourth term: 28(4)+1 = 113<br>