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To substitute a number into an algebraic expression, all you need to do is re-write the expression in exactly the same way, except replacing the variable (letter) with the number. It always makes it clearer ...

y = x^x -- Yikes! Doesn't that look ugly. It's mostly the x^x part, since ... to the x is fine, and x to the ... is fine. We must split the two x's in order to continue. Perhaps we could log? since then we c...

We can only add probabilities when the events are alternatives . For example, let's say we want to calculate the probability that we achieve an A or a B or a C in a given exam. We cannot achieve an A and B f...

A function is a notion somewhat abstract to the non-experienced reader, but can be explained as follows: You have a domain - that is a set, e.g. the set of all yellow birds. You also have a magic box with no...

In simple terms a log is asking what power do I need to raise the base to to get that answer.For example log 2 32.In this case the "base" is 2.So what power do you have to raise 2 to, to get 32?The...