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121, C. Consider the integral - dr. Use the theorems from Section 4.4 to get upper and lower bounds for the signed error (est

Theorem 4.4 Let f e C4[a,b], n be even, h = (b - a)/n, and x; = a + jh, for each j = 0, 1,...,n. There exists a ue (a, b) for

Theorem 4.5 Let f e C?[a, b], h = (b - a)/n, and x; = a + jh, for each j = 0,1,...,n. There exists au € (a,b) for which the C

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Answer :- Consider the Integral I re dx , comparing with pan food da, we get LO Xo = 1, xn=e, f00-5 xn= xornh let n = 10 - 2..}d2 = 0,3 [at 1+0.5+ 2 CO-9001+ 0.8333 + 07692 +0.7143 to 6667 + 0.6250 +0.5882 +0.5556 to 5263) [o I = 3! [1.5+2 (6-1877)]=0.6931[3 ] Midpoint sule we have ² 1 dx, xn=2, xo=1, T Let n=4, we get xn= not nh .-) 2 = 1 +4h =) 1=an a h= 114 The subintervals cAlso, ļ fw dz = ge / dx = [ log x] = log a- log 1 = log 2-0 a dog a =10 69311 True relue Error Estimation Treepezoidal sule e

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