Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given.
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a = 1 ; r = \frac { 1 } { 2 }

a _ { 5 } = \frac { 1 } { 16 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n - 1 }

a _ { 5 } = \frac { 1 } { 32 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n - 1 }

a _ { 5 } = \frac { 1 } { 32 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n }

a _ { 5 } = \frac { 1 } { 16 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n }

$Find the fifth term and the nth term of the geometric sequence whose initial term, a, and common ratio, r, are given. - a = 1 ; r = \frac { 1 } { 2 } A) a _ { 5 } = \frac { 1 } { 16 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n - 1 } B) a _ { 5 } = \frac { 1 } { 32 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n - 1 } C) a _ { 5 } = \frac { 1 } { 32 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n } D) a _ { 5 } = \frac { 1 } { 16 } ; a _ { n } = 1 \cdot \left( \frac { 1 } { 2 } \right) ^ { n }$

Express the Sum Using Summation Notation 3+12+27+…+753 + 12 + 27 + \ldots + 753+12+27+…+75

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Express the Sum Using Summation Notation $3 + 12 + 27 + \ldots + 75$

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