December 2010
2 posts
In the climax of what was probably the worst beginning to winter break in my life yesterday, I lost my iPod touch. I’m not too worried about the data on it—it’s locked, and if someone gets through that, it’ll wipe itself as soon as it’s connected to the Internet.
No, what really annoys me is that now I don’t have an iPod. I’ve been thinking about replacing it with the same model once I can...
5 tags
Five to the What Now?
Say you have the problem 5⁶⁻⁴ⁿ=3125. If you want to find the same bases, and don’t happen to remember that 3125 is 5⁵, you can use your graphing calculator to help (in a way other than entering 5ⁱ⁺¹ over and over).
Go to y=, and enter 5^X. Go to table (that’s 2ɴᴅ+ɢʀᴀᴘʜ, but you knew that), and voilà! In the Y column, you should be able to find 3125. The X column shows the exponent.