KeytoMatlabExercise7SchoolofMathematicalSciencesXiamenUniversityhttp:/gdjpkc.xmu.edr Warning: inverse(1/(x+lr2)is not unique In C: MATLAB6p5 toolboxlsymbolic\@sym\inverse m at line xi is in(0, 1) > abs(subs(f, xi)-f int) ans (x+1)(5+1)2Key to MATLAB Exercise 7  School of Mathematical Sciences Xiamen University  http://gdjpkc.xmu.edu.cn  Key to Ex7­7  Warning: finverse(1/(x+1)^2) is not unique.  > In C:\MATLAB6p5\toolbox\symbolic\@sym\finverse.m at line 43  xi =  2^(1/2)­1  % xi is in (0, 1) >> abs(subs(f, xi)­f_int)  ans =  0  % 1 2 2 0 1 1  ( 1) ( 1) dx  x x = + + Ú