(1 point) Determine whether the sequences are increasing, decreasing, or not monotonic. If increasing, enter 1 as your answer. If decreasing, enter - 1 as your answer. If not monotonic, enter 0 as your answer. -1 1. an = 2n + 9 0 2. an = 2 - cos n -1 3. an = 2n(1 point) If the infinite curve y = (3*, x Z 0, is rotated about the x-axis, find the area of the resulting surface. Note: If the surface area is infinite, type "infinity" in lowercase letters. Hint: In order to evaluate the integral, first perform a u-sub and then a trig sub. You should get to the point where you have to compute f sec3 0 (10 which is equal to %(sec 0 tan 0 +1n | sec 0 + tan 0|) + C. This is not an integral that you are expected to memorize for the test. Area = '1 .31566666667 (1 point) To find the length of the curve defined by y = 5x* + 6x from the point (0,0) to the point (3,423), you'd have to compute f(x)dx a where a = 0 3 , and f(x) = x^2+4/4x