(10 points) Use linear approximation, i.e. the tangent line, to approximate 3.86 as follows: Let f (x) = x6. The equation of the tangent line to f (x) at x = 4 can be written in the form y = mx + b Using this, we find our approximation for 3.86 is [: (10 points) Let y = ex/1. Find the differential dy when x = 2 and dx = 0.2 Find the differential dy when x = 2 and dx = 0.04