initial commit / add all books

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+//interpolation by iteration

+//example 3.24

+//page 116

+clc;clear;close;

+x=[300 304 305 307];

+y=[2.4771 2.4829 2.4843 2.4871];

+x0=301;

+for i=1:3

+    d=determ([y(i),(x(i)-x0);y(i+1),(x(i+1)-x0)])

+    d1(i)=d/(x(i+1)-x(i));

+end

+for i=1:2

+    d=determ([d1(i),(x(i+1)-x0);d1(i+1),(x(i+2)-x0)])

+    d2(i)=d/(x(i+2)-x(i+1));

+end

+for i=1:1

+    d=determ([d2(i),(x(i+2)-x0);d2(i+1),(x(i+3)-x0)])

+    d3(i)=d/(x(i+3)-x(i+2));

+end

+printf(' the value of log(%d) is : %f',x0,d3(1))