Dhivya Dharshini Asked a Question
October 12, 2020 6:27 ampts 30 pts
Then F, = [1, 2]. F,2. F,2 Since every closed interval is a closed set, therefore {F : n e N} is a family of infinite N of closed sets. We observe that F, uF = [1, 2] F,uFuF222 and so on. Indeed, U F = ]0, 2], which is not a closed set. n = 1
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  • Shashi ranjan sinha thankyou
    Try to figure out these intervals on the number line...or u can simply observe that [1,2] is properly contained in [1/2,2].... so if u take their union , you will get [1/2,2].... i...
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    Dhivya Dharshini
    But there while taking union getting [1/2,2]
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