Complex Numbers [in RUN-MAT]
You may have noticed the calculator can provide complex number answers, for example when nding the roots to
equations where the graph does not ‘cut’ the x-axis. Here the calculator that performs complex number calculations
in either a + ib form or polar form (lzl and arg z).
Differentiation [in RUN-MAT]
The calculator can perform differentiation at any point and draw any
derived function required.
Answer: -4 - 7i and 8.06 cis (-2.09) (2 d.p.)
The real part and imaginary parts of the complex number can be separated, conjugates can be found and of course
the complex number can be treated as a coordinate point for graphical representations.
Example
Simplify (1 - 2i)(2 - 3i) and change the answer to polar form Result
Key in the expression
OPTN
F3
(
1
-
2
F1
)
(
2
-
3
F1
)
EXE
Change to polar form
to insert
F2
[Abs]
(
)
EXE
to insert
DEL
F3
[Arg]
EXE
Example
Evaluate the slope of the curve f(x) = (x - 2)e
X
at x = 3 Result
Key in the expression
Note: A comma is required then the x-value
OPTN
F4
F2
(
X,
θ
,T
-
2
)
SHIFT
In
X,
θ
,T
,
3
)
EXE
KEY
KEY
cont. on next page
CHAPTER 7 | PG 55
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