Question

Is this correct?

Answer 1

When I do this lim in a software appears -1/2

Answer 2

\[\sqrt{1} = \pm 1\]

Answer 3

And also, just look at the first equation to consider whether it will become positive or negative.

Answer 4

Also, this belongs in the math section, not the feedback section c:

Answer 5

I posted in wrong section... I don't understand what you typed -> \[\sqrt{1} = \pm 1\]

Answer 6

What is the square root of 1? Well, we need a number that we can square to get 1.
1 works. Why? Because (1)*(1) = 1
-1 also works. Why? Because (-1)*(-1) = 1

Answer 7

And this is actually true any time we take the square root of a positive number. We get two answers, although we generally only consider the positive root.

Answer 8

aah right. Then, if I answer -1/2 or 1/2 is correct right?

Answer 9

The most correct answer would be both.

Answer 10

Second best would be to just put (-1/2), since, if we're going to ignore one of those roots, it should be the negative one by convention.

Answer 11

thanks!!

Answer 12

My pleasure =D