anonymous
  • anonymous
Find an equation for the nth term of the arithmetic sequence. a19 = -58, a21 = -164 an = 896 - 53(n - 2) an = 896 - 53(n - 1) an = 896 + 53(n + 1) an = 896 - 53(n + 1)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
@peachpi
anonymous
  • anonymous
now you have to find a1 and d. d is like slope, and you can think of the numbers as points, so use something like the slope equation |dw:1435788072594:dw|
anonymous
  • anonymous
so it would be -146 - -58 / 21- 19 = -44

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anonymous
  • anonymous
then what
anonymous
  • anonymous
I got -53
anonymous
  • anonymous
oh you used -146 instead of -164
anonymous
  • anonymous
ohhhh ok nvm
anonymous
  • anonymous
ok yea i got -53
anonymous
  • anonymous
then use the a_n formula to solve a_1 |dw:1435788320276:dw|
anonymous
  • anonymous
so it would be -a1=164-53(20)
anonymous
  • anonymous
yes
anonymous
  • anonymous
and then reduce that to get a number for a1
anonymous
  • anonymous
so a1=896?
anonymous
  • anonymous
yes
anonymous
  • anonymous
so the answer would be an=896-53(n-1)?
anonymous
  • anonymous
yes
anonymous
  • anonymous
ok thank you so much!
anonymous
  • anonymous
you're welcome

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