Help modulus

Help.
You know for here this q.
When I want to make 4-|2x| negative since on my graph it’s going down when x is going up.
What would it be? Because you only make the modulus negative right. So is it like on my whiteboard for the point I circled on my graph (calc) ??

Do u only make the mod part negative like in my working or all the stuff in the left??

(edited 11 months ago)

Reply 1

mqb2766

Youre still not writing the interval and inequality clearly. There are two intervals for this mod function

1) x<0, so |2x| = -2x, so
4 - |2x| > x becomes
4 + 2x > x
and you only accept solutions for which x is negative.

2) x>0, so |2x| = 2x
4 - |2x| > x becomes
4 - 2x > x
and you only accept solutions for which x is positive..

If youre continually having these problems, write the interval, |@| = +/-@ and check solution parts out clearly each time.

(edited 11 months ago)

Quick Reply

Related discussions

Latest

Articles for you

LaTex

What is an LLM and how could it benefit your career?

Powerful questions business students forget to ask their career advisers

Why I chose a law degree and what studying law was like