Given dxdt=6x\frac{dx}{dt} = 6xdtdx=6x, which function x(t)x(t)x(t) satisfies x(0)=4x(0) = 4x(0)=4?
x(t)=4e6tx(t) = 4e^{6t}x(t)=4e6t
x(t)=6e4tx(t) = 6e^{4t}x(t)=6e4t
x(t)=4+e6tx(t) = 4 + e^{6t}x(t)=4+e6t
x(t)=e6t+4x(t) = e^{6t} + 4x(t)=e6t+4