- #1
unscientific
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Homework Statement
I have attached the question, along with the solution in the picture attached. This is one of the few questions I have encountered that I completely have no idea what the solution is trying to do...
It's like they do not make any sense at all!
Confused by
1. The summation on the right - i have no idea what is the purpose of it
2. The terms inside the brackets are also rather weird in terms of Mk-1 or Mk. The summation on the left - it starts from k = 2, 3, ... which doesn't even match the terms in the brackets!
Homework Equations
The Attempt at a Solution
I tried finding the d' Alembert's ratio but it gave me nonsensical answer of as long as x < 0 the series converges which is not true. If you compare the series to 1/n, the series diverges for x > -1
Will appreciate it if anyone can help.