Munirah Arishi2022-05-192022-05-191125https://drepo.sdl.edu.sa/handle/20.500.14154/10487The main objective of this dissertation is, studying the spectral approximate solutions for linear ordinary differential equations of any order with polynomial coefficients ,by using the shifted Chebyshev polynomials.enThe shifted chebyshev coefficients of the moments of differentiated and integrated expansions and their uses in finding the spectral solutions for ordinary differential equationsThesis