Question: Problem 1 5 . 4 . Directly from Definition 1 5 . 1 show that the function g :RlongrightarrowR: x | x 2 + 1

Problem 15.4. Directly from Definition 15.1 show that the function
g:RlongrightarrowR:x|x2+12||
is differentiable at every x0inR (and find the derivative).
Problem 1 5 . 4 . Directly from Definition 1 5 .

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