Derivatives

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Each question is graded on a single answer: a check that this chapter's methods work, not a test of the reasoning behind them.

Using the limit definition, find

f^{'} (x)

for

f (x) = 3 x + 1

. That is, compute

lim_{h \to 0} \frac{f ( x + h ) - f ( x )}{h}

Your answer