Which function y(x)y(x)y(x) satisfies y′=4x3y' = 4x^3y′=4x3 with y(0)=3y(0) = 3y(0)=3?
y=x4y = x^4y=x4
y=x4+3y = x^4 + 3y=x4+3
y=12x2+3y = 12x^2 + 3y=12x2+3
y=x3+3y = x^3 + 3y=x3+3