f(x)=x^3+kx^2+5x+4sin^2x be an increasing function on x€R then domain of k is:A.(-√2,√2)B.(-infinity,√3)C.(√3,infinity)D.(-√3,√3)
f(x)=x^3+kx^2+5x+4sin^2x be an increasing function on x€R then domain of k is:
A.(-√2,√2)
B.(-infinity,√3)
C.(√3,infinity)
D.(-√3,√3)