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So, here I am, finally remembering to do my blog. Sigh. I really don't understand why my memory is so terrible.
Anyway, this week was fairly simple in Advanced Math. This section had to do with notation. There are four formulas to find notation: sum, difference, product, and quotient of functions.
1. Sum of f and g: (f+g)(x) = f(x) + g(x)
2. Difference of f and g: (f-g)(x) = f(x) – g(x)
3. Product of f and g: (f * g) g)(x) = f(x) * g(x)
4. Quotient of f and g: (f/g)(x) = f(x)/g(x), provided g(x) not equaled to 0
All this is basically saying is that in the problems that follow, plug everything in the parenthesis of f or g into the equation where there is a variable

For example,
f(3)= 7x= 21
You'd then plug 3 in where there's a x.
7 * 3 = 21
Ta da

For another example
g(4)= 5-x= 9
Then you plug in 4 for the x.
5 - 4 = 9