Question

Help please :D
For modulus inequalities, we are taught that |x| 10 years ago

Answer 1

the definition is
if \( x \ge 0\) then |x| = x
if \(x \le 0\) then |x| = -x

so you could analyze your problem for those two different regions (i.e. x<=0 or x>-0)
where you replace the modulus with the corresponding value for x

Answer 2

oh but in this case it would be more effective to consider x>1 and so on?

Answer 3

@phi

Answer 4

I think first you consider the cases x>=0 and x<= 0
then for each case, you subdivide into more cases.

Answer 5

haha ok thanks :D