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.
PG 에서 a_n = 4 * 3^(n-1) . a_7 을 계산하시오
PG 에서 a_n = 4 * 3^(n-1) . a_7 을 계산하시오
Natural Language
Math Input
Extended Keyboard