HP 10413 Datasheet download pdf (Page 277)

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This group of functions is provided to manipulate polynomials.

We will use the following function to illustrate some of the tools in the

Polynomial group.

() ( 2)( 3)( 1) 7 6fx x x x x x=− + −=−+

POLYCOEF([root1,root2,…])

This function returns the coefficients of a polynomial with roots

123

, , ,...xxx

The roots must be supplied in vector form means in square brackets.

The function

()

above has roots 2, -3 and 1. The screen shot below

shows POLYCOEF correctly giving the coefficients as 1, 0, -7 and 6 for a

final polynomial of

() 7 6fx x x=−+.

POLYEVAL([coeff1,coeff2,…],value)

This function evaluates a polynomial with specified coefficients at the point

specified. The coefficients must be in square brackets, followed by the value

of x (not in brackets). ie.

()

xx x=−+ has value 12 at x = 3.

Note: If evaluating more than one point it is probably more efficient to enter

the function into the SYMB view of the Function aplet. Then either use

the NUM view to find the function values required, or simply type F1(3),

F1(-2) etc. in the HOME view.

f(x)

1 2 3 4 5-1-2-3-4-5

-2

-4

1 2 ... 272 273 274 275 276 277 278 279 280 281 282 ... 330 331

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HP 10413 Datasheet Page 277

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