Ни Нина v=dv/dt a=dv/dt (4t+8t^2-16t^3)''=(2t-4t^2+t^3)'' t=4/17 при t=4/17 v1=((4t+8t^2-16t^3)' =-48t^2+16t+4 v2=(2t-4t^2+t^3)'=3t^2-8t+2