Part A. If a function f has a derivative at x not. then f iscontinuous at x not. (How do you get the converse?)
Part B. 1) There exist an arbitrary x for all y (x+y=0). Isfalse but why?
2) For all x there exists a unique y (y=x^2) Is true butwhy?
3) For all x there exist a unique y (y^2=x) Is true but why?
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