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Assertion (A): When a polynomial $$f(x)$$ is divided by $$(3x + 4)$$, then the remainder is $$f\left(-\frac{3}{4}\right)$$. Reason (R): Remainder theorem states that when a polynomial $$f(x)$$

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Question

Assertion (A): When a polynomial $$f(x)$$ is divided by $$(3x + 4)$$, then the remainder is $$f\left(-\frac{3}{4}\right)$$.

Reason (R): Remainder theorem states that when a polynomial $$f(x)$$ is divided by $$(x - \alpha)$$, then the remainder is $$f(\alpha)$$.

Options

  • Both A and R are true, and R is the correct explanation of A.

  • Both A and R are true, but R is not the correct explanation of A.

  • A is true, but R is false.

  • A is false, but R is true.

MCQ
Assertion and Reasoning
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Solution

A is false, but R is true.

Explanation:

Since $$3x + 4 = 3\left(x + \frac{4}{3}\right)$$, the remainder on division is $$f\left(-\frac{4}{3}\right)$$, not $$f\left(-\frac{3}{4}\right)$$. So A is false, while R is the correct remainder theorem.

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Chapter 8: Remainder Theorem and Factor Theorem - COMPETENCY-FOCUSED QUESTIONS [Page 130]

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R.S. Aggarwal Mathematics [English] Class 10 ICSE
Chapter 8 Remainder Theorem and Factor Theorem
COMPETENCY-FOCUSED QUESTIONS | Q 1. | Page 130
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