Formally stated, the derivative of a function of the form

with *k* a constant and with respect to an independent variable *x*, is simply,

I find this to be extremely handy in all cases. Consider the simple case in which,

In the same way,

In a more complex example,

In an even more complex example,

How about this one?

Unbelievably powerful!

In a subsequent post there is an insightful description on how this powerful method can be derived by employing the typical differentiation rules. Check it out…

Link to this post!

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