HP 40gs - Manual (Page 202)

14-20 Computer Algebra System (CAS)
Example
Given:
calculate a primitive of f.
Type:
Or, if you have stored f(x) in F, that is, if you have already
typed:
then type:
INTVX(F)
Or, if you have used DEF to define f(x), that is, if you have
already typed:
then type:
INTVX(F(X))
The result in all cases is equivalent to:
You will obtain absolute values only in Rigorous mode.
(See “CAS modes” on page 14-5 for instructions on
setting and changing modes.)
Example
Calculate:
Typing:
f x ( )
x
x
2
1 –
-------------- LN x 1
+
x 1 –
------------
⎝ ⎠
⎛ ⎞
+ =
NTVX
X
X
2
1 +
--------------- LN X 1
+
X 1 –
-------------
⎝ ⎠
⎛ ⎞
+
⎝ ⎠
⎛ ⎞
TORE
X
X
2
1 –
--------------- LN X 1
+
X 1 –
-------------
⎝ ⎠
⎛ ⎞ F
, +
⎝ ⎠
⎛ ⎞
DEF(F(X)
X
X
2
1 –
--------------- LN X 1
+
X 1 –
-------------
⎝ ⎠
⎛ ⎞
⎠
⎞
+ =
X LN
X 1 +
X 1 –
-------------
⎝ ⎠
⎛ ⎞ 3
2
--- LN X 1 – ( ) 3
2
--- LN X 1 + ( ⋅ + ⋅ + ⋅
2
x
6
2 + x
4
x
2
+ ⋅
----------------------------------- x d
∫
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