hey,
just a simple question
1)whats the triangle rule? the thing abt adding the sides together? (sorry that wasnt inequalities)
2) when u do absolute values such as
|x|+x = 2x if x is greater or equal to 0 or
= 0 if x < or equal to 0
do u need the " or equal to" in the 2nd bit when uve already mentioned it in the first bit? coz i didn't bt then the answers did.
3) for |x|+|y| i did:
thanks in advance!
just a simple question
1)whats the triangle rule? the thing abt adding the sides together? (sorry that wasnt inequalities)
2) when u do absolute values such as
|x|+x = 2x if x is greater or equal to 0 or
= 0 if x < or equal to 0
do u need the " or equal to" in the 2nd bit when uve already mentioned it in the first bit? coz i didn't bt then the answers did.
3) for |x|+|y| i did:
- x+y if x,y is greater or equal to 0
- y-x if x<0 and y is greater or equal to 0 or
- -x-y if x<0 and y < 0
- x-y if x is greater or equal to 0 and y <0
thanks in advance!