How do I find an equation for the tangent line to the graph of f(x)=(sqrt(x))/(4x-8) at the point (3, f(3))?
I don't understand what I'm supposed to do with f(3) for y . Am I supposed to find the derivative of the graph for the slope at the points first then somehow use x and y to find my y=mx+b ?
I don't understand what I'm supposed to do with
1 Answer
Equation of tangent line ,
Explanation:
To find the equation of the tangent line we must first find the gradient at the given point, i.e,
So ,
And from the equation of a straight line ,
So the equation of the tangent line becomes