Please help me taylor series

[malu]

∞
pi =Σ (-1)^n an
n=0
where an = ........................Approximating the value of pi by the first 5 terms , we can get pi ˜ .......................................
using the alternating series estimation , the upper bound for your error of our estimate if you use the first 10 terms is................
Please I'm really need help to resolve this ....please.
Thanks.

 

[stapel]

It appears that some of the information has been omitted. What went in where you currently have ellipses? Also, please note that it can be quite difficult to decipher meaning when sentences do not end with standard puncuation, and standard capitalization is not used.

When you reply, please show all of your work and reasoning thus far. Thank you.

Eliz.

P.S. Welcome to FreeMathHelp!

 

[pka]

Here are some tools and hints:
\(\displaystyle \L \begin{array}{l}
\pi = \sum\limits_{n = 0}^\infty {\left( { - 1} \right)^n a_n } \\
\arctan \left( x \right) = \sum\limits_{n = 0}^\infty {\frac{{\left( { - 1} \right)^n x^{2n} }}{{2n + 1}}} \\
\pi = 4\arctan (1) \\
\end{array}\)