Grade 12Differential Calculus
f(X) = x/{1+|x|} is
A) strictly increasing
B) strictly decreasing
C) neither inc nor dec
D) none
f(X) = x/{1+|x|} is
A) strictly increasing
B) strictly decreasing
C) neither inc nor dec
D) none
1 Answer
ANAM V. RANGA REDDY
answer: A
solution: f1 (x) = 1⁄(1+|x|)2
f1(x)>0 hence f(x) is a strictly increasing function
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