Application of DerivativeMedium
Question
A curve with equation of the form y = ax4 + bx3 + cx + d has zero gradient at the point (0,1) and also touches the x-axis at the point (-1,0) then the values of x for which the curve has a negative gradient are -
Options
A.x > -1
B.x < 1
C.x < -1
D.-1 ≤ x ≤ 1
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