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What does the calculus formula F '(x) = Lim △ x → 0 (f (x + △ x) - f (x)) / △ x mean? I'm a self learner - what's the slope.
The geometric meaning of the formula (f (x + △ x) - f (x)) / △ x is the slope of the line between two points (x + △ x, f (x + △ x)), (x, f (x)) on the curve. When △ x approaches 0, it means the slope of the secant when the two points are infinitely close, that is, the slope of the tangent of this point
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