Question

x(t)=t^4+0.5t^2-3t. U(2), a(2)

Answer 1

U=x'(t)
U=4t^3+1t-3
U(2)=4*2^3+2-3=31

a=U'(t)
a=12t^2+1
a(2)=12*2^2+1=49