Posted by Meera on Sunday, December 9, 2012 at 8:59pm.
Which of the following statements would always be true?
I. If f is differentiable at x = c, then f is continuous at x = c.
II. If f is continuous at x = c, then f is differentiable at x = c.
III. If f is not continuous at x = c, then f is not differentiable at x = c.

calc  Damon, Sunday, December 9, 2012 at 10:01pm
Rules
If differentiable, then continuous (hard to define derivative of a function at a point where it jumps)
However if continuous, maybe differentiable maybe not. (example of not is x at x = 0
so
1. is true
2. not always
3. is true
logic relation of q 1 to q 3
if a cow, then a mammal hypothesis (assume true)
if a mammal then a cow (false) (converse)
if not a cow, then not a mammal (false)(inverse)
if not a mammal, then not a cow (true)(contrapositive)
see
http://hotmath.com/hotmath_help/topics/converseinversecontrapositive.html
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