: the derivation
since "e" is a constant, and the derivative of any constant is 0, we will consider taking the derivative of ex. Its derivative is as follows...
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What does this mean? We see the graph of ex is:
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The derivative of a function enables us to find the slope of any point of that function. For example, if f(x)=x2, then dy/dx=2x is the slope of the curve at any point x.
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Here, we see that if x=1, then the slope (also the tangent of the curve at a given point) is two. If x=2, then the slope will be 4 and so on according to y=2x. Getting back to how this affects ex, we find that the derivative of exis also ex. The graphs of which are identical:
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