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anonymous

  • one year ago

WILL FAN AND MEDAL What are the explicit equation and domain for a geometric sequence with a first term of 4 and a second term of -8?

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  1. anonymous
    • one year ago
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    an=4(-2)^n-1; all integers where n≥0 an=4(-2)^n-1; all integers where n≥1 an=4(-12)^n-1; all integer where n≥0 an=4(-12)^n-1; all integer where n≥1

  2. campbell_st
    • one year ago
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    ok... just a correct.... you answer choices are for a geometric sequence and your question mentions an arithmetic sequence..

  3. anonymous
    • one year ago
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    Sorry fixed it

  4. campbell_st
    • one year ago
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    so to get from 4 to -8 by multiplying the common ratio is -2 and a term in a geometric sequence is found using \[a_{n} = a_{1} \times r^{n - 1}\] where \[a_{1} ~ 1st ~term~~~~~~and~~~ r = common ~ratio\] the domain is \[n \ge 1\] so substitute what you know into the general equation to get the explicit form

  5. anonymous
    • one year ago
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    Oh okay thank you :)

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