Question

inequality question

Answer 1

type them here

Answer 2

click on the screen shot - its there

Answer 3

Eh, we did a similar question yesterday.. is there anything you didnt understand there?

Answer 4

i know it was similar but i tend to forget things ;(

Answer 5

Just revise the question we did yesterday.. and tell me what you dont understand

Answer 6

okay, give me a sec

Answer 7

mmm its complicated, could you do the first one as an example then i do the next one?

Answer 8

ok.. so what does the |.| actually is? its a modulus function and it only takes the absolute value of a function..
for the first one.. |x-5|=4 .. so that means.. (x-5) can be equal to 4.. and -(x-5)=4.. get it?

Answer 9

|x+a| = x+a for x>-a, a+ or x >a, a-

Answer 10

x>-a, a-

Answer 11

-(x+a) for x<-a,a+ or x<-a,a-

Answer 12

sry i had to eat @yrelhan4

Answer 13

okay so what does x-5 mean? if it equals 4 then x equals 1?? im a little lost...

Answer 14

x-5=4 --> x=9
-(x-5)=4 --> x=1

Answer 15

wait so i was right? x = 1? but how does the 9 come in?

Answer 16

i just thought if x-5=4 so it has to be 1...

Answer 17

as i said.. |..| is a modulus function. it will always give a positive value.. put x=9 in there.. what does it give? 4.. put 1 in there.. it gives -4.. but as it is a modulus function the answer would be +4..

and what? x-5=4 gives you 1?? add 5 both sides.. x-5+5=4+5 --> x=9 (because -5+5 =0)

Answer 18

so the final answer would be both 9 and 1..
to solve these kind of questions.. you consider two cases.. one when the function inside the modulus and positive and one when it is negative.. because the mod will convert the negative value to the positive value.. so it will have two values.

i know i am not explaining really well.. wait for someone else to come in and explain it to you.

Answer 19

i can try to do it your way :)

Answer 20

lol there is no 9 and 1 answer

Answer 21

Look at D.. it says the same thing. :)

Answer 22

ahh i see