I need to find the infinite sum of the following series expansion
1/3+2/32+3/33+4/34+⋯+k/3k+…
I know that
x/(1−x)=x+x2+x3+⋯+xk+…
We need to find the x value in order to find the infinite sum. What could the x value be? I am not sure.
How to find lim without lhopital rule? I know when I use lhopital I easy get $$ \lim_{h\rightarrow 0}...
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