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Aproximarea functionalelor liniare

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Introducere<br />

Derivare numerică<br />

Integrare numerică<br />

Cuadraturi adaptive<br />

Cuadraturi . . .<br />

Cuadraturi . . .<br />

Formule . . .<br />

Home Page<br />

Title Page<br />

◭◭ ◮◮<br />

◭ ◮<br />

Page 26 of 58<br />

Go Back<br />

Full Screen<br />

Close<br />

Quit<br />

Deci,<br />

R2(f) = 1<br />

4! f (4) (ξk)R2(e4),<br />

R2(e4)= x5 k+2 − x5 k<br />

−<br />

5<br />

h 4<br />

xk + 4x<br />

3<br />

4 k+1 + x4 <br />

k+1<br />

<br />

=h 2 x4 k+2 + x3 k+2xk + x2 k+2x2 k + xk+2x3 k + x4 k<br />

5<br />

− 5x4 k + 4x3 kxk+2 + 6x2 kx2 k+2 + 4xkx3 k+2 + 5x4 <br />

k+2<br />

12<br />

= h 4<br />

−xk + 4x<br />

60<br />

3 kxk+2 + 6x 2 kx2k+2 + 4xkx 3 k+2 − x4 <br />

k+2<br />

=− h<br />

60 (xk+2 − xk) 4 = −4 h5<br />

15 .<br />

R2(f) = − h5<br />

90 f (4) (ξk).

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