Calculus
# Derivatives

If $f(x)=2x+5,$ what is the value of $f'(3)?$

If $f(x)=x^2+7x,$ what is the value of $f'(6)?$

Find the derivative of $f(x)=13x^3$ using the definition of derivative

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

Find the derivative of $f(x)=-2x^2+3x+26$ from the definition

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