anonymous
  • anonymous
A series is given by the formula Tn=3+2n-n^2 (b) Find n if the nth term is −252.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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hartnn
  • hartnn
just plug in Tn = -252 then you get a quadratic equation in 'n' can you solve quadratic equations ?
anonymous
  • anonymous
|dw:1358754263944:dw|
anonymous
  • anonymous
n can't b negative so take positive sign n = 2+32/2 n=17

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anonymous
  • anonymous
thnx smarty pants
hartnn
  • hartnn
@Ayeshaafzal ,can you work that out by yourself ??
anonymous
  • anonymous
yes but i was confuse about using 2n in quadratic i didnt know we didnt have to use n in it
hartnn
  • hartnn
ok.

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