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Real analysis - differential/sequence

  • #1

Homework Statement



I attached a .bmp file

Homework Equations





The Attempt at a Solution



I don't get this one at all. Since f is differentiable, the interval [a,b] must be continuous, and I cannot use rational/irrational tricks like in limit problems. does anyone have suggestions?
 

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Answers and Replies

  • #2
should I just assume that x=c and xn -> c as n->inf?
 

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