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Question #60796

Difficulty: 8/10 | 🟢 Free

The Question

Consider the function f(x)=15∑k=15∣x−k∣f(x) = \frac{1}{5} \sum_{k=1}^5 |x - k|. \ \textbf{Statement I:} There does not exist any c∈(0,6)c \in (0, 6) such that f′(c)=0f'(c) = 0. \ \textbf{Statement II:} Rolle's Theorem is not applicable to f(x)f(x) on the interval [0,6][0, 6] because f(x)f(x) is non-differentiable at x=1,2,3,4,5x = 1, 2, 3, 4, 5.

Options

  • A.

    Statement I is true, Statement II is true; Statement II is a correct explanation for Statement I

  • B.

    Statement I is true, Statement II is true; Statement II is NOT a correct explanation for Statement I

  • C.

    Statement I is true, Statement II is false

  • D.

    Statement I is false, Statement II is true

Check Your Answer

Correct Answer

Step-by-Step Solution

Explanation

How the Examiner Thinks

Monster

Ultra-high difficulty questions designed to test your limit, stamina, and deep conceptual understanding.

Concepts Behind This Question

Properties of Arithmetic Mean|Mean Value Theorem Applicability|Modulus Function Breakdown

Why This Question Is Tricky

Examiner Levers

Logical Assertion

Tests the causal relationship between two true statements.

Difficulty Boost : +4

Common Mistakes

This question tests the causal relationship between the non-applicability of Rolle's Theorem and the non-existence of a zero derivative.

The 'Modulus Function Breakdown' creates multiple non-differentiable points, making Statement II true.

Students often fall into the trap of assuming that because the theorem's prerequisites fail, the conclusion must also fail, thereby incorrectly choosing Statement II as the explanation for Statement I.

However, the true reason f′(c)≠0f'(c) \neq 0 is the parity of the number of terms in the arithmetic mean of the modulus functions; an even number of terms would yield a zero derivative interval despite the exact same non-differentiability conditions.

Quick Facts About This Question

Question Information

SubjectMathematics
ChapterStatistics - Class 11
ConceptProperties of Arithmetic Mean
Difficulty8
Cognitive Load7
Target Solve Time160 sec
AccessFree