Find dx/dy of 2x^3+2xy+y^2=9
Find dx/dy of 2x^3+xy^2+lnx=19
Find limit x->infinity (2x^3-3x+6)/(5x^3-4x^2+6)
Critical values for f(x)= x^3-x+2
Find limit x->infinity (42x^2-x+4)/(5x^3-3x^2+8x+6)
