3 and 4 pls

3. [0/1 Points] DETAILS PREVIOUS ANSWERS LARCALCET7 9.8.015. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 answer is an interval, enter your answer using interval notation. If the answer is a finite set of values, enter your answers as a comma separated list of values.) E ( x )" Need Help? Read It Watch It Viewing Saved Work Revert to Last Response Submit Answer 4. [-/1 Points] DETAILS LARCALCET7 9.8.020.MI. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 answer is an interval, enter your answer using interval notation. If the answer is a finite set of values, enter your answers as a comma separated list of values.) ( 3 x ) 1 1 = 0 ( 2n )