This week in Math I learned how to add radicals.

Ex. 

We must simplify the radicals first.

=

Because we know the , we can move it to the outside of the radical.

=

This is now the simplified version of

now we have

Because we have the same number inside the radical we can just add the coefficients.

So our final answer would be

This week we learned about absolute values.  an absolute value is the principal square root of the square of a number.

Ex.

This is the case because

So, a simpler way of defining an absolute value is to say that it is simply the number, disregarding its sign (positive or negative.)

This week in Math we learned about geometric sequences.  A geometric sequence is a sequence of numbers where you multiply each number of the sequence by a set number called the common ratio (r) to get the next number.

Ex. 5, 10, 20, 40 …

in this case r=2 because 10/5=2 and also 40/20=2

to find any term in a geometric sequence we use this formula:

So if we wanted to find we would use that formula.

Therefore, .