a) f(x) = (5x2-x*√(x)+3x3*√(x))/(2*√x2)
= 5x^2 - x^{1,5} + 1,5x^{2,5} hilft sicher schon
b) f(x) = (cos(x)/x2) - (tan(x)/√(x))
f ' (x) = (cos(x) * 2x - (-sin(x))* x^2 ) / x^4
c) f(x)= xlog(x) f ' (x) = 1 * log(x) + 1 * 1/x
d) f(x) = 2x
3e
x - 3
x + e
5 3^x = e
(x*ln(3))
f ' (x) = 2x^3 * e^x + 6x^2 * e^x - ln(3) * 3^x