I know how to do part A. The parts after however, are giving me some trouble :/
Part b: y = (1/3)x^3 + (1/2)x^2 + (1/4)x
y' = 3(1/3)x^2 + 2(1/2)x^1 + 1(1/4)x^0
y' = x^2 + x + 1/4 The derivative of a constant is zero.
y'' = 2x + 1
c) s = -2t^-1 + 4t^-2 (Write as negative exponents; it's easier.)
x' = -1(-2t^-2) + -2(4t^-3)
x' = 2t^-2 - 8t^-3
x'' = -4t^-3 + 24t^-4
d) r = 12θ^-1 - 4θ^-3 + θ^-4
r' = -12θ^-2 + 12θ^-4 - 4θ^-5
r'' = 24θ^-3 - 48θ^-5 + 20θ^-6
e) r = 2θ^(-1/2) + 2θ^(1/2) Easier to work if negative, fractional exponents.
r' = -θ^(-3/2) + θ^(-1/2) Subtract 1 from each exponent
r'' = (3/2)θ^(-5/2) - (1/2)θ^(-3/2)
f) w = re^(-r)
w' = -re^(-r) (Do you have exponentials?)
g) y = x^(-3/5) + π^(3/2) π^(3/2) is a constant, so its derivative is zero
y' = (-3/5)x^(-8/5) Subtract 1 from the exponent