1.If f(x)=3x2+6x−9f(x) = 3x^2 + 6x - 9f(x)=3x2+6x−9, thena.f(x)f(x)f(x) is increasing in (−1,3)(-1, 3)(−1,3)b.f(x)f(x)f(x) is decreasing in (3,∞)(3, \infty)(3,∞)c.f(x)f(x)f(x) is increasing in (−∞,−1)(-\infty, -1)(−∞,−1)d.f(x)f(x)f(x) is decreasing in (−∞,−1)(-\infty, -1)(−∞,−1)Login to continueOnly logged in users canattempt or see the solution.
