ComedkApplication Of DerivativesCOMEDK 2025 Morning ShiftMCQ+1 / -02025The curve $a x^3+b x^2+c x+d$ has a point of minima at $x=1$, thenA $3 a+b<0$B $3 a+b>0$C $3 a+b=0$D $a+3 b>0$Check AnswerClear SelectionReveal AnswerShow Explanation