Suppose that f : [0; 1] ! R is increasing on [0; 1] and that 0
< a < 1. Prove that limx!a? f(x)
exists.
So, this directly proves that as this function gradually increases therefore at any point between x=(0,1) the limit exists for sure, as limit at a (ie. Between 0 and 1) exists !!
Not at x={0} and not at x={1} since the Left Hand limit at x=0 and Right Hand limit at x=1 is not defined.
But in between those numbers, the limit always exists.
Hence, proved !!
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