GR9768 Q 50
Posted: Tue Apr 06, 2010 12:45 pm
How many continuous real-valued dunctions f are there with domain [-1,1] such that (f(x))^2 = x^2 for each x in [-1,1] ?
A) 1
B) 2
C) 3
4) 4
E) inf.
I thought of f = x, -x, |x|
any other ?
could it be |-x| ?
A) 1
B) 2
C) 3
4) 4
E) inf.
I thought of f = x, -x, |x|
any other ?
could it be |-x| ?