I really need help with these two problems please

Use the Limit Comparison Test to determine the convergence or divergence of the series. CD zn+1 n=17\"+1 6\"+1 7n+1 o converges O diverges Find the interval of convergence of the power series. (Be sure to include a check for convergence at the endpoints of the interval. If the interval of convergence is an interval, enter your answer using interval notation. If the interval of convergence is a finite set, enter your answer using set notation.) as Z n!(x+8)" 1-3-5---(2n1) n=1