Question

Infinite Series and Integral Test,





Who can explain to me what is this term and how to find it ----> http://screencast.com/t/l9MRpwca

Answer 1

\(a\) is the value such that if \(k\geq a\) then \(u_k=f(k)\).

Answer 2

a is the "starting point" where your series and the function "match up", and usually it's obvious. For an examples, see
http://tutorial.math.lamar.edu/Classes/CalcII/IntegralTest.aspx