Science talk:Math Exam Resources/Courses/MATH220/April 2011/Question 10 (b)

I don't think it is helpful to say <<for fairly obvious reasons>> without mentioning these so obvious reasons.

Also, a key idea is that b_n is decreasing. The hint should hint to this fact.

right!

I'll restate the hint and add another hint for the fact that b_n is decreasing.

well done.