Examining the geometric sequence, we notice that it has an initial value of 3 and a common ratio of 10. Therefore, to go from one term to the next we have to multiply by 10. This makes it quite easy to calculate terms since, when multiplying by 10, we just add a 0 to the end of the previous term.
3, 30, 300, 3000, 30 000, 300 000
Below, we have calculated the sum of this series.
3+ 30+ 300+ 3000+ 30 000+ 300 000
⇓
3 3 3 3 3 3
