D(x²) = 2xdx + dx² (ignored)(xdx is the area of the small rectangle, 2 coz two rectangles)df = 2xdxdf/dx = 2x

1. 00:19 · 30 May 2026 · Sat

   

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   D(x²) = 2xdx + dx² (ignored)
   (xdx is the area of the small rectangle, 2 coz two rectangles)
   df = 2xdx
   df/dx = 2x