defence exam SSB Head Constable (Communication) 2023 Mock Test Mathematics Differential Calculus Applications of Derivatives
The value of 'a' so that f(x) = sin x - cos x - ax + b decreases for all real values of x is given by
1
\(a \ge \sqrt 2 \)
2
\(a < \sqrt 2 \)
3
\(a \ge 1\)
4
a < 1