Use the Formula for the General Term of a Geometric $$\mathbf { a } _ { 1 }$$

question 84

Multiple Choice

Use the Formula for the General Term of a Geometric SequenceUse the formula for the general term (the nth term) of a geometric sequence to find the indicated term of the
sequence with the given first term, $$\mathbf { a } _ { 1 }$$ , and common ratio, r.
- $$0.007,0.14,2.8,56 , \ldots$$

• A) \(\mathrm { a } _ { \mathrm { n } } = 0.007 ( 20 ) ^ { \mathrm { n } - 1 }\)
• B) \(\mathrm { a } _ { \mathrm { n } } = 7 ( 0.2 ) ^ { \mathrm { n } }\)
• C) \(\mathrm { a } _ { \mathrm { n } } = 7 ( 20 ) ^ { \mathrm { n } }\)
• D) \(\mathrm { a } _ { \mathrm { n } } = 0.07 ( 20 ) ^ { \mathrm { n } - 1 }\) The general term of a sequence is given. Determine whether the given sequence is arithmetic, geometric, or neither. If the sequence is arithmetic, find the common difference; if it is geometric, find the common ratio.

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