anonymous
  • anonymous
Use synthetic division to determine whether the number k is an upper or lower bound (as specified for the real zeros of the function f). k = 2; f(x) = 2x3 + 3x2 - 4x + 4; Lower bound?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
I got yes, is that correct?
anonymous
  • anonymous
That is a different question.
0_0youscareme
  • 0_0youscareme
oh okay

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anonymous
  • anonymous
Do you have any idea if my answer is correct?
amistre64
  • amistre64
what does it mean to be an lower bound?
anonymous
  • anonymous
Alternation between non negative and non positive in signs, post division.
anonymous
  • anonymous
I think
amistre64
  • amistre64
hmm, there is a thrm about it, can you post your materials thrm for it?
amistre64
  • amistre64
http://www.wtamu.edu/academic/anns/mps/math/mathlab/col_algebra/col_alg_tut39_zero2.htm this seems to be what you are learning about
amistre64
  • amistre64
2x3 + 3x2 - 4x + 4 0 4 14 20 k=2| 2 7 10 24 since all the results are the same sign ... k=2 seems to be what type of bound?
amistre64
  • amistre64
2x3 + 3x2 - 4x + 4 0 -4 2 4 k=-2| 2 -1 -2 8 when we let k=-2, the signs are not alternating are they ...
amistre64
  • amistre64
http://www.wolframalpha.com/input/?i=y%3D2x%5E3+%2B+3x%5E2+-+4x+%2B+4 notice that it only has one real root, and it is less than 2 ... it is even less then -2 if tha tmatters
anonymous
  • anonymous
Okay, so it is not lower bound.

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