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What is the sum of all the coefficients of the polynomial \(p(x)=7x^3-4x^2-2x-1\)?

Answer and explanation

Correct answer: 0

The sum of the coefficients is \(7+(-4)+(-2)+(-1)=0\). For any polynomial, the sum of its coefficients is obtained by calculating \(p(1)\); here, \(p(1)=7-4-2-1=0\). Therefore, option A is correct. Exam tip: substitute \(x=1\) to find the sum of coefficients, whereas \(x=0\) gives the constant term.

Related tags

Sum Of CoefficientsPolynomial EvaluationPolynomials In One VariablePolynomialsMathematicsClass 10 Mcq

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