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ChrisV

Determine whether Rolle's theorm can be applied on the closed interval [a, b]. If Rolle's theorm can be applied, find all vales of c in the interval [a,b] such that f'(c)=0. If Rolle's theorm cannot be applied, explain why not.

  • 2 years ago
  • 2 years ago

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  1. ChrisV
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    f(x)=(x-1)(x-2)(x-3), [1,3]

    • 2 years ago
  2. satellite73
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    since \[f(1)=f(3)=0\] and since any polynomial is differentiable you can use rolle

    • 2 years ago
  3. satellite73
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    \[f(x)=x^3-6 x^2+11 x-6\] \[f'(x)=3x^2-12x+11\] so rolle says there somewhere in [1,3] there is a number c with \[f'(c)=0\] set \[3x^2-12x+11=0\] solve for x

    • 2 years ago
  4. ChrisV
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    that is where i am stuck, i got that far

    • 2 years ago
  5. satellite73
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    use the quadratic formula if it does not factor

    • 2 years ago
  6. satellite73
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    if that is too annoying, then cheat http://www.wolframalpha.com/input/?i=3x^2-12x%2B11%3D0

    • 2 years ago
  7. ChrisV
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    -b+-sqrt(b^2-4ac)/2a?

    • 2 years ago
  8. satellite73
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    yup

    • 2 years ago
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