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Using the to find slope at any point along f(x)=x^2 watch next lesson. More intuition of what a derivative is. Practice this lesson yourself on.
Practice this lesson yourself on. Watch the next lesson. Logarithmic differentiation khan.
Sal finds the definite integral of (6+x)/x between 2 and 4. Here we use the formal properties of continuity and differentiability to see why chain rule is true. Thanks to all of you who support me on patreon.
To do that, he has use 1/x, which is ln(x). Sal differentiates the logarithmic function log(x+x) using our knowledge of derivative log(x) and chain rule. He then differentiates log.