Question

Consider the following table of data points:

f(x) i Xi 0 0.000 1.00000 1 0.125 0.98450 2 0.250 0.93941 0.375 0.86882 4 0.500 0.77880 5 0.625 0.67663 6 0.750 0.56978 0.875

Using least squares fitting, find the polynomial Q(x) of degree 2 that fits the data points given in the table above. Approximate f(0.3) using Q(0.3).

Use P(x) = Ax2+Bx +C to find 3 equations and then find A,B,C.

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Answer #1

CB Ax Σ3, Σ Σ. γ C Σα0 Σ Σ Ξ Σχ Α Σ. 2 Σ Σ Σ- 2- S3 12 S Σ-. Ξ5 Σε -2. 401+ 1 Σ3; (Sο 6, Σ Σ 2-141602 Σ3. 98059.9 3. 187S Ο Ο0-3541 в6 7 о.7389244 375 .-о. в273 89 S1Eb.0 о.07819S75 6.02851312 с о s/0.0751 0.738984ч о.5 1 L9 Fh5E: о - о- в691033 — о.

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