Sep 10th, 2021 Show that any line in R2 is closed for the usual topology…. 1 answer below » Exercise 3. Show that any row in R2 is shut for the ordinary topology. A row is the set of points (x,y) such that ax + by + c = 0 for some constants a,b,c. Attachments: ff3.pngff5.pngff8.png