use the de if f(x)=x²+x. lim fcath)-f(a) hoo #6 Discuss and graph fix) = 3x+2 (25 points) 2X-4 #7 Find the area between f(x) = x²5x-7 and g(x) = x-12 over [-2, 5]. (20 points) #8 Use shell method to find the volume by rotating the region under y=x-Ź about X=-3. (20 points) over [1,4] #9 Find a sect dt (10 points) d dx #10 A revolving light, located 5 km from a straight shoreline, turns at constant angular speed of 3 rad/min. With what speed is the spot of light moving along the