i found this question in a workbook:
f(x) = |4-x| , x=6
whats that line "|" enclosing 4-x for??
the answer is -2, btw
pls help me maths experts out there
2006-12-11 04:58:13 · 5 answers · asked by quinie leong 3 in Science & Mathematics ➔ Mathematics
sorrry!!!! the answer supposed to be 2, and i dont know how to get it
2006-12-11 15:34:37 · update #1
| a | denotes absolute value or the distance 'a' is from zero on a number line. It is always >= 0, since it represents distance.
|a| = a, if a >= 0
= -a, if a< 0.
|a - b| denotes the distance between a & b, on a number line.
f(6) = |4 - 6| = |-2| = 2.
In other words, 4 & 6 are 2 units apart.
2006-12-11 05:13:12 · answer #1 · answered by S. B. 6 · 0⤊ 0⤋
THe "I" lines on either sided stand for the Modulus value of what is in between. In simpler terms, it is the positive value of whatever comes, if -6, it is +6 , if it is +8 it is still +8. So, Modulus means, ignore minus sign.
4 - (-2) is 6. Hence ans is 6. Hope you get it
2006-12-11 13:05:03 · answer #2 · answered by Venkateswaran A 2 · 0⤊ 0⤋
-2&45-3#2+8=5
2006-12-11 13:03:35 · answer #3 · answered by Anonymous · 0⤊ 1⤋
The "l" means "absolute value" it means that it doesn't matter if you get a negative value you're answer will always be positive
2006-12-11 13:09:05 · answer #4 · answered by Ant C 1 · 0⤊ 0⤋
that line stand for absolute value
2006-12-11 13:06:17 · answer #5 · answered by katie 4 · 0⤊ 0⤋