我想問....
1)absolute value 係咪永遠都會係 正數..... |-4| = (-4)(-1) =+4
|4| = +4
2) solve the absolute value problems:
|m+4| =3
|m+4|>3
係咪會有2 answers?
F.4 Absolute value
2007-01-02 4:01 pm
回答 (2)
2007-01-02 4:07 pm
✔ 最佳答案
1absolute value 係永遠都會係 正數
|-4| = (-4)(-1) =+4
|10|=10
2
是會有2 answers
for
|m+4| =3
m+4=3 or -3
m=-1 or -7
for
|m+4|>3
m+4>3 or m+4<-3
m>-1 or m<-7
2007-01-02 4:10 pm
1.加左absolute sign (兩棟) 一定係正數..
如果係加左absolute sign 既vector就即係佢既magnitude (到vector果課會教)
2.solve 呢類problems 要分cases.
睇多d書既example應該會明
2007-01-02 08:11:23 補充：
即係 |x|=10case 1) x=-10case 2) x= 10
如果係加左absolute sign 既vector就即係佢既magnitude (到vector果課會教)
2.solve 呢類problems 要分cases.
睇多d書既example應該會明
2007-01-02 08:11:23 補充：
即係 |x|=10case 1) x=-10case 2) x= 10
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