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Culegere de probleme de Analiz˘a numeric˘a

Culegere de probleme de Analiz˘a numeric˘a

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102 Interpolare<br />

c11 = f(1)−f(0)−f ′ (0)−2f(0)−2f ′ (0)+2f(1)−f ′ (1) =<br />

= 3f(1)−3f(0)−3f ′ (0)−f ′ (1)<br />

c21 = −3c10−c11 = −6f(0)−3f ′ (0)+6f(1)−3f ′ (1)−3f(1)+3f(0)+3f ′ (0)+f ′ (1) =<br />

= −3f(0)+3f(1)−2f ′ (1)<br />

Altfel. Pe [0,1], s(x) coinci<strong>de</strong> cu polinomul <strong>de</strong> interpolare Hermite cu nodurile<br />

duble 0 s¸i 1, H3f, iar pe [a,0) ∪ (1,b] este un polinom <strong>de</strong> grad 1 tangent la<br />

H3f<br />

⎧<br />

⎨<br />

s(x) =<br />

⎩<br />

f ′ (0)x+f(0) x ∈ [a,0)<br />

(H3f)(x) x ∈ [0,1]<br />

f ′ (1)x+f(1)−f ′ (1) x ∈ (1,b]

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