JEE Main 2017 — Application Of Derivatives Question with Solution
From: JEE Main 2017 (Online) 9th April Morning Slot
Question
The function f defined by
f(x) = x3 3x2 + 5x + 7 , is :
f(x) = x3 3x2 + 5x + 7 , is :
Choose an option
Show full solutionCorrect option: A
Correct answer
Aincreasing in R.
Step-by-step explanation
The given function is
The discriminant of the above quadratic equation is
Therefore,
Also,
Therefore, the given function f is increasing in R.
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