monirg
Well-known Member
- Joined
- Jan 11, 2005
- Messages
- 629
Hello;
I'm trying to understand how complex numbers are handled/processed in Excel.
As related to my application, an interesting exercise would be to use Goal Seek w/s command to find the roots of the equation:
X^2 + 4 = 0
setting the (rounded) value in cell A2 to 0 by changing A1
Obviously a conventional or direct use of Goal Seek wouldn't work since Excel treats complex numbers as text.
Perhaps, one should use Goal Seek twice in this case:
first: find the coefficient "a" for IMREAL(A2) = 0
second: find the coefficient "b" for IMAGINARY(A2) = 0
and the root would be "a+bi".
There might be an easier way to do it. Any thought ??
Thank you kindly.
I'm trying to understand how complex numbers are handled/processed in Excel.
As related to my application, an interesting exercise would be to use Goal Seek w/s command to find the roots of the equation:
X^2 + 4 = 0
setting the (rounded) value in cell A2 to 0 by changing A1
Code:
A1:: 1+i
A2:: =COMPLEX(ROUND(IMREAL(IMSUM(IMPOWER(A1,2),4)),6),
ROUND(IMAGINARY(IMSUM(IMPOWER(A1,2),4)),6))
Perhaps, one should use Goal Seek twice in this case:
first: find the coefficient "a" for IMREAL(A2) = 0
second: find the coefficient "b" for IMAGINARY(A2) = 0
and the root would be "a+bi".
There might be an easier way to do it. Any thought ??
Thank you kindly.