prove every open interval is an open set
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An open subset of R is a subset E of R such that for every x in E there exists ϵ > 0 such that Bϵ(x) is contained in E. For example, the open interval (2,5) is an open set. Any open interval is an open set. Both R and the empty set are open.
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Magnetic fields
↳ space surrounding a magnet within which a magnetic force is experienced.
It is a rector quantity . SI unit is tesla.
Magnetic field Lines
h Imaginary lines used to represent magnetic field.
When iron fillings are kept near a magnetic ,they get arranged in a pattern which rep
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