Using the definition of derivative of a function at a point, f′(a)=lim x→a f(x)−f(a)/x−a, find the slope of the curve at the given point or state that the slope is undefined. f(x)=13x^2 + x - 14; a=-3 The slope is ______ Note: type 'undefined' if you think the slope of the curve is undefined at the given points.

Using the definition of derivative of a function at a point, f′(a)=lim x→a f(x)−f(a)/x−a, find the slope of the curve at the given point or state that the slope is undefined.

f(x)=13x^2 + x - 14; a=-3

The slope is ______

Note: type 'undefined' if you think the slope of the curve is undefined at the given points.