Calculus/Infinite Limits/Infinity is not a number/Solutions

Write out an explanatory paragraph for the following limits that include $\infty$. Remember that you will have to change any comparison of magnitude between a real number and $\infty$ to a different phrase. In the second case, you will have to work out for yourself what the formula means.

1. $\lim _{x\to \infty }{\frac {1}{x^{2}}}=0$

This formula says that I can make the values of ${\frac {1}{x^{2}}}$ as close as I would like to 0, so long as I make x sufficiently large.

2. $\sum _{n=0}^{\infty }2^{-n}=1+{\frac {1}{2}}+{\frac {1}{4}}+{\frac {1}{8}}+\cdots =2$

This formula says that you can make the sum $\sum _{n=0}^{i}2^{-n}$ as close as you would like to 2 by making $i$ sufficiently large.