Determine the sum of the following infinite series: $\sum _ { k = 0 } ^ { \infty } \left( \frac { 1 } { 3 } \right) ^ { k }$ $( 2 ) ^ { \mathrm { k } + 1 }$ .
Enter just an integer.

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The Answer of Determine the sum of the following infinite series: $\sum _ { k = 0 } ^ { \infty } \left( \frac { 1 } { 3 } \right) ^ { k }$ $( 2 ) ^ { \mathrm { k } + 1 }$ .
Enter just an integer.

Determine the Sum of the Following Infinite Series ∑k=0∞(13)k\sum _ { k = 0 } ^ { \infty } \left( \frac { 1 } { 3 } \right) ^ { k }∑k=0∞​(31​)k

Determine the Sum of the Following Infinite Series $\sum _ { k = 0 } ^ { \infty } \left( \frac { 1 } { 3 } \right) ^ { k }$