Question

$f(x)=|x-1|+2|x-3|-|x+2|$ is monotonically increasing at $x=$ ?

• A. $-2$,
• B. 0
• C. 3
• D. 5

Answer 1

Answer: (D)

at $x=-2$ decreasing
at $x=0$ decreasing
at $x=3$ neither increasing nor decreasing
at $x=5$ increasing