รากจริงของผลบวกบางชุดของพหุนามเซบีเซฟ

Abstract

            The functions defined by Tn(Χ) = cos(n arccos Χ) for n ∈ {0, 1, 2, . . .} are called Chebyshev polynomials of the first kind. In this paper, we find all real zeros of Tm(Χ) + Tn(Χ), Tk(Χ) and Tk(Χ).