Thread: Need a little Help

This question is part of the same test so i guess it has some type of relevance.



What type of formula or method do i use to solve this?

Re:

Originally Posted by qbkr21

4. D (i believe)

There is no right answer to 4, it should be |x|sqrt(y), as by convention sqrt()
is positive (for real positive argument), so sqrt(x^2 y) is by convention
positive, but x sqrt(y) has the same sign as x.

RonL

Originally Posted by CaptainBlack

There is no right answer to 4, it should be |x|sqrt(y), as by convention sqrt()
is positive (for real positive argument), so sqrt(x^2 y) is by convention
positive, but x sqrt(y) has the same sign as x.

RonL

ah yes. my bad. sqrt(x^2) = |x| by definition. you know that mistake messed me up in a proof class once, lost like 5 points, i should remember that

you guys are so pro at confusing me sometimes lol.