If 'R' is the least value of 'a' such that the function f(x) = x^2 + ax + 1 is increasing on [1, 2] and 'S'...

Question

If 'R' is the least value of 'a' such that the function f(x) = x^2 + ax + 1 is increasing on [1, 2] and 'S' is the greatest value of 'a' such that the function f(x) = x^2 + ax + 1 is decreasing on [1, 2], then the value of |R – S| is ____.

Accepted Answer

2

JEE Main 2021 Mathematics question

Solution