- #1
mynameisfunk
- 125
- 0
OK, in my book we have an inequality ||z|-|w||[tex]\leq[/tex]|z+w|[tex]\leq[/tex]|z|+|w| then from here it simply states, "Replacing w by -w here shows that ||z|-|w||[tex]\leq[/tex]|z-w|[tex]\leq[/tex]|z|+|w|.
How do we know that?
is |z+w|=|z-w|?? Note that z and w are complex numbers.
How do we know that?
is |z+w|=|z-w|?? Note that z and w are complex numbers.