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Which of the following expressions is a polynomial in one variable?
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Answer and explanation
Correct answer: \(4x^3-2x+7\)
In \(4x^3-2x+7\), the powers of \(x\) are 3, 1 and 0, all non-negative integers; hence it is a polynomial in one variable. \(3/x=3x^{-1}\) has a negative exponent. Exam tip: check that every variable exponent is 0, 1, 2, ... .
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What is the correct answer to this question?
\(4x^3-2x+7\)
Why is this the correct answer?
In \(4x^3-2x+7\), the powers of \(x\) are 3, 1 and 0, all non-negative integers; hence it is a polynomial in one variable. \(3/x=3x^{-1}\) has a negative exponent. Exam tip: check that every variable exponent is 0, 1, 2, ... .
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Polynomials. Topic: Polynomials in one variable.
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