Andy Long
or
(expands in terms of x by default). If you want the expansion in terms of a, then you would type
which would give
Note:
The coefficients of each term come from Pascal's triangle:
Etc.!
Factor will try to create linear terms in x (by default), i.e.
returns . I personally prefer to define a function in the ``Y='' menu, e.g.
and then use
If you have to use a function over and over, it's usually smart to define it in a way that will be stored for future use.
Now we can do things like solve for where the derivative is zero:
for example yields , one of the most important trig identities.
yields another: .
This command would represent the sum
which is similar to the type of sum we need when creating Riemann sums.