Find the Sum of the Geometric Series for Those X $$\sum _ { n = 0 } ^ { \infty } 7 ^ { n } x ^ { n }$$

question 40

Multiple Choice

Find the sum of the geometric series for those x for which the series converges.
- $$\sum _ { n = 0 } ^ { \infty } 7 ^ { n } x ^ { n }$$

• A) \(\frac { 1 } { 1 + 7 x }\)
• B) \(\frac { 1 } { 1 - 7 x }\)
• C) \(\frac { 7 } { 1 + 7 x }\)
• D) \(\frac { 7 } { 1 - 7 x }\)

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