state gov RPSC 2nd Grade Senior Teacher Mock Test Series 2025 Mathematics Differential Calculus Applications of Derivatives
The function f(x) = -2x3 - 9x2 - 12x + 7 is a strictly increasing function in the interval
1
(-∞, -2) ∪ (-1, ∞)
2
[-2, -1]
3
(-∞, -2] ∪ [-1, ∞)
4
(-2, -1)
5
Question Not Attempted