(→Defination) |
|||
| Line 1: | Line 1: | ||
| − | |||
== Review of Complex Number == | == Review of Complex Number == | ||
| Line 9: | Line 8: | ||
complex number. | complex number. | ||
| − | + | We use i to represent <math>sqrt(-1)</math>. | |
| − | + | ||
| − | + | ||
Revision as of 18:36, 1 September 2008
Review of Complex Number
Defination
Imaginary number comes to use when people want to refer to a number which could not be represented by any real number,
such as the square root of a negative number. When we combine a real number and an imaginary number together, we get a complex number.
We use i to represent $ sqrt(-1) $.
