Rolles Theorem
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Questions and Answers

What is a necessary condition for Rolle's theorem to be valid?

  • f(a) ≠ f(b)
  • f(x) is differentiable in the closed interval [a, b]
  • f(x) is continuous in the open interval ]a, b[
  • f(x) is continuous in the closed interval [a, b] and f(x) is differentiable in the open interval ]a, b[ (correct)

What can be said about the function f(x) if it is constant in the interval [a, b]?

  • The function is increasing at x = a
  • The function has a minimum value at x = a
  • f'(x) = 0 for all x ∈ [a, b] (correct)
  • The function has a maximum value at x = c

What happens to the function f(x) as x takes values slightly greater than a, according to Rolle's theorem?

  • It always decreases
  • It remains constant
  • It always increases
  • It either increases or decreases (correct)

What is the condition for Rolle's theorem to be applicable?

<p>The function is differentiable in the interval [a, b] (A)</p> Signup and view all the answers

What can be said about the slope of the tangent at x = c, according to Rolle's theorem?

<p>The slope is zero (B)</p> Signup and view all the answers

What can be concluded about the function f(x) at x = c if f(x) increases in the interval a < x < c and then decreases in the interval c < x < b?

<p>The function has a maximum value at x = c (A)</p> Signup and view all the answers

What is the geometric interpretation of Rolle's theorem?

<p>The tangent is parallel to the x-axis at x = c (B)</p> Signup and view all the answers

What is the geometric interpretation of the portion AB of the curve y = f(x) in the interval x = a to x = b?

<p>The curve is continuous and goes from A to B (A)</p> Signup and view all the answers

What can be said about the slope of the tangent at x = c if f(x) has a maximum value at x = c?

<p>The slope is zero (B)</p> Signup and view all the answers

What is the condition for the minimum value of f(x) to exist in the interval [a, b]?

<p>The function is continuous and differentiable in the interval [a, b] (D)</p> Signup and view all the answers

What is the condition for Rolle's theorem to be applicable to a function f(x) defined on [a, b]?

<p>f(x) is continuous on [a, b] and f(a) = f(b) (D)</p> Signup and view all the answers

If a function f(x) satisfies the conditions of Rolle's theorem on [1, 3], then what can be said about the behavior of the function at x = 2?

<p>The function has a critical point at x = 2 (D)</p> Signup and view all the answers

What is the geometric interpretation of Rolle's theorem?

<p>The tangent to the curve at some point is parallel to the x-axis (B)</p> Signup and view all the answers

If a function f(x) has two distinct roots in [0, 1], then what can be said about the behavior of the function in this interval?

<p>The function has a maximum or minimum value in [0, 1] (A)</p> Signup and view all the answers

If a function f(x) is defined as f(x) = ax^3 + bx^2 + 11x - 6, then what can be said about the behavior of the function at x = 2?

<p>The function has a critical point at x = 2 (B)</p> Signup and view all the answers

If f(x) = ax^3 + bx^2 + 11x - 6 satisfies the conditions of Rolle's theorem on [1, 3], then what can be said about the function f'(2)?

<p>f'(2) = 0 (C)</p> Signup and view all the answers

If f(x) = x^3 - 3x + a has two distinct roots in [0, 1], then what can be said about the function f(x) in this interval?

<p>f(x) has a maximum value (C)</p> Signup and view all the answers

If a function f(x) is defined on [a, b] and satisfies the conditions of Rolle's theorem, then what can be said about the tangent to the curve at x = c?

<p>The tangent is parallel to the x-axis (D)</p> Signup and view all the answers

If f(x) is a polynomial of degree n, then what can be said about the number of zeros of f(x) in the interval (0, 1)?

<p>At least one zero (D)</p> Signup and view all the answers

If a function f(x) is defined on [a, b] and has a maximum value at x = c, then what can be said about the slope of the tangent at x = c?

<p>The slope is zero (A)</p> Signup and view all the answers

What can be concluded about the derivative of f at x = c if f is continuous on [a, b] and differentiable on (a, b), and f(a) = f(b) = 0?

<p>f'(c) = 0 (A)</p> Signup and view all the answers

What is the geometric interpretation of the portion AB of the curve y = f(x) in the interval x = a to x = b if f increases in the interval a < x < c and then decreases in the interval c < x < b?

<p>The curve has a horizontal tangent at x = c (D)</p> Signup and view all the answers

What is the condition for the existence of a maximum value of f(x) in the interval [a, b]?

<p>f'(c) = 0 for some c in (a, b) (A)</p> Signup and view all the answers

What can be said about the function f(x) if it is differentiable on (a, b) and f'(x) = 0 for some x = c in (a, b)?

<p>f(x) has a maximum or minimum value at x = c (A)</p> Signup and view all the answers

What is the relationship between the slope of the tangent at x = c and the derivative of f at x = c?

<p>The slope of the tangent is equal to the derivative (B)</p> Signup and view all the answers

What is the condition for Rolle's theorem to be applicable to a function f(x) defined on [a, b], given that f(x) is continuous in the closed interval [a, b] and differentiable in the open interval ]a, b[?

<p>f(a) = f(b) (D)</p> Signup and view all the answers

What can be said about the function f(x) at x = c, if f(x) increases in the interval a < x < c and then decreases in the interval c < x < b?

<p>The function has a maximum value at x = c. (A)</p> Signup and view all the answers

What is the geometric interpretation of the portion AB of the curve y = f(x) in the interval x = a to x = b?

<p>The curve has a horizontal tangent at x = c. (A)</p> Signup and view all the answers

What can be said about the function f(x) if it is not constant in the interval [a, b] and since f(a) = f(b)?

<p>The function must either increase or decrease in the interval a &lt; x &lt; b. (C)</p> Signup and view all the answers

What is the necessary condition for the slope of the tangent to be zero at x = c?

<p>The function must have a maximum value at x = c. (D)</p> Signup and view all the answers
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