\f2. Which integral arises after making an appropriate substitution to evaluate J V9 -x2dx A. f 9 sin Ode B. f 9 cos Ode C. f 9 cos2 0de D. f - sin2 ede E. S - cos2 0de\f\f\f\f\f\f\f10. Which of the following recurrence relations will generate a sequence with a3 = -3? A. anti = 1 - 2an; a1 =1 B. anti = -an; 01 = 1 C. ant1 = an + 1; a1 =-5 D. anti = -3 + an; a1 = 0 E. anti = 3an; a1 = -1 12\f12. A cylindrical water tank has the height 8m and the radius 2m. It is half full of water. Water has the density p % and the acceleration due to gravity is 5. The work done pumping all the water to the top of the tank is: A 327 pg J . 647 pg ] 1287 pg J . 256w pg J . 967 pg I =2 O Q ' 14