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Class 9MathematicsIntroduction to PolynomialsLinear polynomialsHard
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If (p(x)=4x-9), what is the correct value of (p(p(3)))?

Answer and explanation

Correct answer: 3

First evaluate the inner function: \(p(3)=4\times3-9=3\). Therefore, \(p(p(3))=p(3)=3\). Hence, the correct answer is 3. The value 9 is only the constant term and is not the value of the function here. Exam tip: In a composite function, always evaluate the inner function first.

Related tags

PolynomialsLinear PolynomialsComposite FunctionsFunction EvaluationClass 9 MathematicsIntroduction To PolynomialsMathematicsClass 9 Mcq
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10 more MCQs
  1. 1If the highest power in a polynomial is 1, what is it called?
  2. 2Which expression is not a linear polynomial?
  3. 3Which expression is a polynomial but not a linear polynomial?
  4. 4Which statement is correct about the zeroes of a non-zero linear polynomial?
  5. 5Which expression is a polynomial in (s) and has degree (1)?
  6. 6If \(p(x)=ax+b\), where \(a\ne0\), is a linear polynomial, which property of its graph is always true?
  7. 7Which of the following expressions is a linear polynomial in \(x\)?
  8. 8A taxi charges a fixed fee of ₹50 and ₹12 per kilometre. If the distance travelled is represented by \(x\), which statement about \(C(x)=12x+50\) is correct?
  9. 9What type of polynomial is (4x-9)?
  10. 10What is the degree of a linear polynomial?
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