anonymous
  • anonymous
Please help!
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
what can /\TLAS can do for you?
anonymous
  • anonymous
What is the 20th term in the sequence that begins -2, 4, -8, 16...
anonymous
  • anonymous
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anonymous
  • anonymous
I know its multiplying by -2
anonymous
  • anonymous
it is a gp sereis
anonymous
  • anonymous
1st term is -2 2nd term is 4 . . . in this way nth term is (-1)^n*(2)^n so 20th term is (-1)^20*(2)^20
anonymous
  • anonymous
so its D?
anonymous
  • anonymous
@sourav_aich where did you get the -1 and the 2?
anonymous
  • anonymous
you see each alternate term has negative in front of it and 2 is the common ratio

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