HP 40gs - Page 205

Computer Algebra System (CAS) 14-23
Typing:
gives:
2
NOTE: To find the limit as x approaches a
+
(resp a
–
), the
second argument is written:
X=A+0(resp X=A-0)
For the following expression, find the limit as x
approaches +∞:
Typing:
produces (after a short wait):
NOTE: the symbol ∞ is obtained by typing SHIFT 0.
To obtain –∞:
(–)∞
To obtain +∞:
(–)(–)∞
You can also find the symbol ∞ in the MATH key’s
Constant menu.
PREVAL Evaluate a primitive
PREVAL has three parameters: an expression F(VX)
dependent on the variable contained in VX, and two
expressions A and B.
For example, if VX contains X, and if F is a function,
PREVAL (F(X),A,B) returns F(B)-F(A).
lim
NTANX() TAN N X)⋅(–⋅
SIN N X⋅()NSINX()⋅–
-----------------------------------------------------------------
0,
⎝⎠
⎛⎞
xxx++ x–
lim XXX++ X ∞+,–
⎝⎠
⎛⎞
1
2
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