Let r be an integral domain. prove that (a) = (6) for some a,b e r if and only if a = ub for some unit u e r. ha o cammutotiza ina ith 1 p. p ie o nrima dooc na

Let R be an integral domain. Prove that (a) = (6) for some a,b E R if and only if a = ub for some unit u E R. ha o cammutotiza ina ith 1 P. P ie o nrima dooc nat thati