Uh oh! Wolfram|Alpha doesn't run without JavaScript.
Please enable JavaScript. If you don't know how, you can find instructions
here
.
Once you've done that, refresh this page to start using Wolfram|Alpha.
В ГП a_n = 4 * 3^(n-1) . Вычислите a_7
В ГП a_n = 4 * 3^(n-1) . Вычислите a_7
Natural Language
Math Input
Extended Keyboard