Integrate%5B2%5Ex%2C %7Bx%2C 0%2C a%7D%5D %2F Integrate%5B2%5Ex%2C %7Bx%2C 0%2C 48%7D%5D) %3D .5

Uh oh! Wolfram|Alpha doesn't run without JavaScript.

Please enable JavaScript. If you don't know how, you can find instructionshere.Once you've done that, refresh this page to start using Wolfram|Alpha.