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
