2.8.59 Power Series

Condition: lay out the function in the steppe row according to degrees \ (x-x_ {0} \) and indicate the interval of convergence. a) \ (f (x) = e^{x}, \ quad x_ {0} =-1 \) b) \ (f (x) = x \ cos 3 x, \ quad x_ {0} = 0 \)