Relue markRELUE

Chapter 21 of 46

Linear Approximation

Zoom in far enough and every differentiable curve is a line — so borrow the line when the curve is too hard.

Free10–14 min

By the end

Each chapter closes with capabilities, not topics. Watch for these.

01Build the local linearization of a function at a point
02Approximate function values with it
03Decide over- or underestimate from how the curve bends