HP 50G, Руководство пользователя

Страница: 172 / 887

Page 4-5
Changing sign of a complex number
Changing the sign of a complex number can be accomplished by using the
\
key, e.g., -(5-3i) = -5 + 3i
Entering the unit imaginary number
To enter the unit imaginary number type :
„¥
Notice that the number i is entered as the ordered pair (0,1) if the CAS is set to
APPROX mode. In EXACT mode, the unit imaginary number is entered as i .
Other operations
Operations such as magnitude, argument, real and imaginary parts, and
complex conjugate are available through the CMPLX menus detailed later.
The CMPLX menus
There are two CMPLX (CoMPLeX numbers) menus available in the calculator.
One is available through the MTH menu (introduced in Chapter 3) and one
directly into the keyboard (
‚ß
). The two CMPLX menus are presented
next.
Thus, the inverse function INV (activated with the
Y
key) is defined as
2
2
2
2
2 1 1 2
2
2
2
2
2 1 2 1
2 2
2 2
2 2
1 1
2 2
1 1
y x
y x y x
i
y x
y y x x
iy x
iy x
iy x
iy x
iy x
iy x
+
−
⋅ +
+
+
=
−
−
⋅
+
+
=
+
+
2 2 2 2
1 1
y x
y
i
y x
x
iy x
iy x
iy x iy x +
⋅ +
+
=
−
−
⋅
+
=
+