Find the sum Sn below:
Please show your work too. Thanks!...
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Mathematics, 30.08.2021 06:40 keke830
Find the sum Sn below:
![\displaystyle \large{S =1 \cdot 1 + 2 \cdot 5 + 3 \cdot {5}^{2} + 4 \cdot {5}^{3} + ... + n \cdot {5}^{n - 1} }](/tpl/images/2449/4877/77d46.png)
Please show your work too. Thanks!
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