Toytoy Googie's Geeky blog

I found this video is really cool and easy to understand. Please have your attention during factoring because the author of the video did a long factorization of polynomials to make it shorten for the derivatives. and this example also is quite easy,

In this video, I find this tutorial very easy for me to understand what is a partial derivative. It has good examples including a chain rule.

From this video, I found it very easy to understand. Staring 07:23, he use the formula of " Point-Slope Equation of a Line ", which is "y - y1 = m(x - x1)". So y1 = -1, x1 = 1, m = -1 [the result from the derivative using implicit differentiation] so, y - y1 = m(x - x1) y - -1 = m(x - 1) y + 1 = -1 (x -1) y = -x + 1 - 1 y = -x Note that, Point-Slope Equation of a Line is different from Equation of a Straight Line formula .