Question

The function to evaluate the value of a polynomial,l for a constant value of the independent variable(say a)  in the polynomial is ______

(a) poly(p,a), p is a row vector

(b) polyder(p)

(c) polyint(p)

(d) polyval(c,a), c is a row vector

This question was addressed to me during an internship interview.

My query is from Algebra topic in division MATLAB Basics of MATLAB

Answer 1

The correct answer is (d) polyval(c,a), c is a row vector

To elaborate: polyder(p)and polyint(p) produces the differentiation and integration of the polynomial p. Polyval(c,a) is the correct form of the function to evaluate the value of a polynomial whose independent variable is a. The value of a has to be provided first before writing the function.