I saw this question and with my basic knowledge of differentiation I don't know what it means. $\frac{d}{dx}(x^2)$ where $x=3$
Where would I start to solve this?
I saw this question and with my basic knowledge of differentiation I don't know what it means. $\frac{d}{dx}(x^2)$ where $x=3$
Where would I start to solve this?
The derivative of a function is related to the concept of the rate of change of a function.
Either you use the method presented by @Arturo Magidin, or you apply a formula.
An example of a formula is for:
$f(x) = x^{n} $
the derivative (denoted by either ${f}'(x)$ or $\frac{d}{dx} f(x)$ is
$ n x^{n-1} $
so in you case (n=2)
$f(x) = x^{2} $ and $\frac{d}{dx}f(x)= 2 x^{2-1} = 2x$
at point x=3
${f}'(3) = 2*3 = 6$