hp40g+.book Page 17 Friday, December 9, 2005 1:03 AM
DERVX(F)
Or, if you have defined F(X) using DEF, that is, if you have typed:
| DEF(F(X) = | X | + | ||||
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| X | 2 | – 1 | ⎝ X – 1⎠ ⎠ | |
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| then type: |
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| DERVX(F(X)) |
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| Simplify the result to get: | ||||||
| 3 ⋅ x2 – 1 |
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| x4 – 2 ⋅ x2 + 1 |
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DIVPC | Division in increasing order by exponent | ||||||
| DIVPC has three arguments: two polynomials A(X) and | ||||||
| B(X) (where B(0) | ≠0), and a whole number n. | |||||
| DIVPC returns the quotient Q(X) of the division of A(X) by | ||||||
| B(X), in increasing order by exponent, and with deg(Q) | ||||||
| <= n or Q = 0. |
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| Q[X] is then the limited | ||||||
| A[X] |
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| B[X] |
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| in the vicinity of X= 0. |
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| Typing: |
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| DIVPC(1+X2+X3,1+X2,5) | ||||||
| gives: |
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| 1 + x3 – x5 |
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N O T E : |
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When the calculator displays a request to change to | |||||||
| increasing powers mode, respond yes. | ||||||
FOURIER |
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Fourier coefficients |
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| FOURIER has two parameters: an expression f(x) and a | ||||||
| whole number N. |
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FOURIER returns the Fourier coefficient cN of f(x), considered to be a function defined over interval [0, T]
Computer Algebra System (CAS) |
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