1) The real number k for which the equation, 2x3+3x+k=0 has two distinct real roots in [0,1] A) lies between 1 and 2 B) lies between 2 and 3 C) lies between -1 and 0 D) does not exist Answer: Option DExplanation:Let f(x)= 2x3+3x+k On differentiating w.r,t x , we get f′(x)=6x2+3>0,∀xϵR ⇒ f(x) is strictly increasing function. ⇒ f(x)= 0 has only one real root, so two roots are not possible