HP 40gs Manual do Utilizador descarregar pdf (Página 205)

100

101

Computer Algebra System (CAS) 14-23

Typing:

gives:

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()⋅–

-----------------------------------------------------------------

⎝⎠

⎛⎞

xxx++ x–

lim XXX++ X ∞+,–

⎝⎠

⎛⎞

---

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