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Determine f '(x) from first principles if $f(x) =3x^2$
in Grade 12 Maths by Diamond (40.3k points) | 52 views

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First Principle:

$f(x) = 3x^2$

$f(x+h) = 3x^2 + 6xh + 3h^2$

$f ' (x) = \lim_{h \rightarrow 0}\dfrac{f(x+h) - f(x)}{ h}$

$f ' (x) = 6x$
by Wooden (492 points)
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