CH3.2 The Derivative as a Function Ex7–12 數學系卡安很閒 所以決定拯救沒辦法用slader和chegg的莘莘學子 In Exercises 7–12, find the indicated derivatives. 7. dy/dx if y = 2x^3 8. dr/ds if r = s^3 - 2s^2 + 3 9. ds/dt if s = t/(2t + 1) 10. dy/dt if y = t - 1/t 11. dp/dq if p = q^(3/2) 12. dz/dw if z = 1 / sqrt(w^2 - 1)