1) y´=4x³
2)y´=5.3.x²=15x²
3)y´= (x²)´+(9x)´=2x+9
4)y´=((1+x²)´.3x - (1+x²).(3x)´)/(3x)²=(2x.3x -(1+x²).3)/(3x²)=
=(6x²-3-3x²)/(3x)²=(3x²-3)/(3x)²=3(x²-1)/9x²=(x²-1)/3x² , x≠0
1) y´=4x³
2)y´=5.3.x²=15x²
3)y´= (x²)´+(9x)´=2x+9
4)y´=((1+x²)´.3x - (1+x²).(3x)´)/(3x)²=(2x.3x -(1+x²).3)/(3x²)=
=(6x²-3-3x²)/(3x)²=(3x²-3)/(3x)²=3(x²-1)/9x²=(x²-1)/3x² , x≠0