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The behavior of the MATH menu is somewhat similar in the CAS except that it
gives access to a host of new functions available primarily in the CAS. These
functions will only be available on the hp 40g, not on the hp 39g+.
There are two ways that functions can be used. The first is to use them as
the expression is entered. In this method the order is to choose the function
and then to fill in the parameters required. The second is to apply a function
to all or part of an expression that has resulted from a previous calculation.
E.g. 1 Using LIMIT
−
2
x
Find
lim
→
x
7
The sequence of keys for this is...
scroll to LIMIT
2
XTθ X
- 2 XTθ - 35 ▲ ▲ ▲
/ XTθ - 7 ► 7 ▲ ▲ ENTER
1
Find
lim
−
+
→
x
x
2
The sequence of keys for this is...
scroll to LIMIT
1 / XTθ - 2 ► 2 + MATH ►
scroll to QUOTE ENTER
▲ ▲ ▲ ▲ ENTER
ENTER
Note: The limit approached from below would
be entered as 2 - QUOTE(0).
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−
2
x
35
.
−
x
7
ENTER
.
2
ENTER
321
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