1) f(x)=e^x³*cosx
2)f(x)=5^x/2 *tgx
f'(x)= 5^x/2 * ln5 * (x/2)' *tgx+ 5^x/2 * 1/cos²x = 5^x/2 *ln5 * 1/2 *tgx+5^x/2 * 1/cos²x
3)f(x)=x²*lnx
f'(x)=2x*lnx+x² * 1/x = 2x lnx + x
4)f(x)=3^x² *lnx
f'(x)= 3^x² * ln3 * (x²)' *lnx + 3^x² * 1/x = 3^x² * ln3 * 2x *lnx + 3^x² * 1/x