19. Let the common difference of an arithmetic sequence be d, the sum of the first n terms be, the common ratio of a geometric sequence be q. Given $= - = 2 , \mathrm { q } = \mathrm { d } , $ $= 100$.\\
(I) Find the general term formulas of the sequences and.\\
(II) When $\mathrm { d } > 1$, let $= c _ { n } = \frac { a _ { n } } { b _ { n } }$. Find the sum of the first n terms of the sequence.\\