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6.4 (11). Let Ac = f be a tridiagonal system of order n. (a) Give an operation count for forming A = LU, using (6.71). (b) As

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Given that bet axaf be a tridiagonal system of ordern. forla): Give an operation count for forming A-Lu, using (6-71) Here, A=> n(n-1) (0+3)(n-1)(n-3)(n+5) + 6 6 -> (1) {n?+30 +n+ 3n-10] =) (n-1) Co2+3n-5) Similarly for w, total operations are, (n-1)Totalis, 2E n-lit nila n+2.c0-1c0) 2 2n2 are na. Hence total * Similarly for bgoof total operations operation to solve Azafia

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