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← 1 message moved from Basic Mathematics

@user21820 hello sir

@yuvrajsingh I don't know why you keep posting in the wrong room, and keep calling me "sir".

I do not know about the room , sorry for sir @user21820

I have a question

Can i

Is this is your room or sandbox @user21820

← 1 message moved from Logic

@yuvrajsingh This is not the first time you posted in a room without even checking its room description.

Sandbox is not my room, but if you want to post random comments you can do it here.

@user21820 question is this Actually the question was already posted on main site, but no one answer how to get the new function math.stackexchange.com/…

Question if foreign a new step up function by adding two step up function, I did this by plotting the value and get the answer but how to form a graph, with less time is actually my question or how to make new step up function

??? If you cannot even take a tiny bit of effort to paste a proper URL, then stop pinging me.

Wait sir, math.stackexchange.com/questions/2857132/…

@yuvrajsingh Is there something wrong with your memory? Am I a "sir" again?

Besides, the answer by Doug M gives you all you need. Follow it.

But it take a time, I have only 1 hour during my exam

If you cannot do what the exam requires you to do within the time limit, there are two possibilities:

(1) Other students can do it, and you need to practice more if you want to be on par with them.

(2) The exam is stupid.

I help people here to understand mathematics, not how to do well in silly 'exams'.

So if you aren't interested to understand mathematics for its own sake, I'm not interested so you should find somebody else.

Sorry for such question, I will keep you advise, I was solving a exercise on function so, I have a one more question mod x+y-4=5 and mod of x-3+mod y-1=5

Sorry for such question, I will keep you advise, I was solving a exercise on function so, I have a one more question mod x+y-4=5 and mod of x-3+mod y-1=5 @user21820

What I have tried is

To plot the graph of the first line

@yuvrajsingh Your question is incomprehensible. If you mean |...|, use that. "mod" means something completely different.

I understand that mod is different here I am talking about modulus of $x$

You are talking, but incomprehensibly.

If you mean "|x| − 3 + |y| − 1" write that. Don't use terms you don't understand.

If you don't mean what I wrote, then reflect on how unclear your question was.

Let me write it again so second equation is modulus of (x-3)+modulus of (y-1)=5 @user21820

If you insist on not using proper notation, you can stop asking me.

|x+y-4|=5,and |x-3|+|y-1|=5 @user21820

Ok so you tried to plot it, but why not just reason about it by definition of absolute value? Either x+y−4 = 5 or x+y−4 = −5.

The second one you should understand as distance of x-coordinate from 3 plus distance of y-coordinate from 1 totals 5. This is known as the L1-norm and has some other fancy names such as on this webpage.

I thought I will able to solve in a complex form

You did not say what x,y were, so I assumed they are reals, so complex numbers are irrelevant.

Also, don't think about trying to solve this or solve that using this or that method. Instead try to understand what exactly the equations mean, before even trying to do anything else.

Ok

Anyway, I have to go. You should at least read the webpage I linked.

And you should play around with a graph software. The one I use is Graph.

I got your point sir answer is 12 @user21820

127.1

wat