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The first states that the lim k = k as x--> aThe book describes it as being a constant function, so it's the same on either side of the limit

The second states that the lim x = a as x-->a]. The book describes it as saying that if x approaches, so must f(x) but I don't understand that.

If someone could explain or show me an example of these so I can understand what they're trying to say I'd really appreciate it.