a) f(x)=x4 und x0 = 0.5 = 1/2
f(x) = x^4
f'(x) = 4x^3
f(0.5) = 1/16
f'(0.5) = 1/2
t(x) = f'(x0) * (x - x0) + f(x0)
t(x) = 1/2 * (x - 1/2) + 1/16 = x/2 - 3/16
b) f(x)=2x-2 x0=3
f(x) = 2x^2
f'(x) = 4x
f(3) = 18
f'(3) = 12
t(x) = f'(x0) * (x - x0) + f(x0)
t(x) = 12 * (x - 3) + 18 = 12x - 18