Sunday, 9 October 2016

elementary set theory - Preimage of a set under floor function

How would I interpret the pre-image of U=(12,32) under the function g(x)=x? Friend says it's [1,2) but I just can't undrstand it...

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real analysis - How to find limhrightarrow0fracsin(ha)h

How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...