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n(n + 1)/2 = 1 7! Substitute the derivative values in the Taylor series centered at x = 7 and simplify. (Hint:Note that (1) , 1, 1, 1, 1, 1, 1, 1 ...) COS X [V3 _ (x_ 7r) _ \\/5 [X-(/4)]2 + [x (M4)]3 + '5 [x (7r/4)]4 _ ] 2 2 4 2 2! 2 3! 2 4! 6. [112 Points] DETAILS PREVIOUS ANSWERS LARCALC12 10.3.031. MY NOTES ASK YOUR TEACHER | PRACTICE ANOTH Find all points (if any) of horizontal and vertical tangency to the portion of the curve shown. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) x = cos(6) + 9 sin(6) y = sin(9) 9 cos(9) 27r s 6 s 27: horizontal tangents 6 27I, 11?, 1C, 211? y vertical tangents (D II .0 txgl \"I VI [3| l \"I x 3. \"/2 Points] DETAILS PREVIOUS ANSWERS LARCALC12 9.2.061. Find all values of X for which the series converges. (Enter your answer using interval notation.) co 2 (6X)" n=1 x