(main)[4]
A curve is given by $y = x^3 + x^2 - 8x + 7$. There are no stationary points in the interval $a < x < b$. Determine the least possible value of $a$ and the greatest possible value of $b$.
Mathematics 9709 · AS & A Level · Differentiation
Mathematics 9709 · AS & A Level · Differentiation
A curve is given by $y = x^3 + x^2 - 8x + 7$. There are no stationary points in the interval $a < x < b$. Determine the least possible value of $a$ and the greatest possible value of $b$.