anonymous
  • anonymous
Write the recursive formula for the geometric sequence. a1 = -2 a2 = 8 a3 = -32
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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shamil98
  • shamil98
a1 = -2 a2 = 8 a3 = -32 think, what number is multiplied each time?
shamil98
  • shamil98
hint: try finding out the ratio of two consecutive terms, a2/a1 = ?
anonymous
  • anonymous
-4?

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shamil98
  • shamil98
yes.
anonymous
  • anonymous
what does that even mean? ratio of a2/a1 like I don't even .. idk dude
shamil98
  • shamil98
so -4 is multiplied each time to produce the next number in the sequence. for a geometric sequence you need to find the ratio in order to find the recursive formula. since the ratio is -4 your formula would be: a_n = a_n-1 * -4
shamil98
  • shamil98
\[a_n = -4 a_{n-1}\]
shamil98
  • shamil98
the recursive formula for a geometric sequence is as such: \[a_n = a_{n-1} * r \] where r is your ratio
anonymous
  • anonymous
ummmmm okay thank you for helping me even though I have no clue what just happened

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