About Integral Calculus’s question. The text book I used is Advanced calculus by Folland. Chapter 1
maybe helpful. The questions, PDF of the Advanced calculus ‘s solution manual are in the attachments. After I accpeted the solutions, I will give the amount $65 as tips.
1 Solutions to the Assignment
1. (a) R/N is open but it is not closed. We can write
(n, n + 1)) ∪ (−∞, 0) R/N = (
n∈N We see that it is inﬁnite union of open intervals , hence open. But…