Book
Advanced Engineering Mathematics
Author
Erwin Kreyszig
Edition
8th Edition
#guass-jordan for matrix inversion A=matrix(QQ, [[-1,1,2],[3,-1,1],[-1,3,4]]) I=matrix(QQ, [[1,0,0],[0,1,0],[0,0,1]]) A.add_multiple_of_row(1, 0, 3) A.add_multiple_of_row(2, 0, -1) A.add_multiple_of_row(2, 1, -1) A.add_multiple_of_row(1, 2,7/5 ) A.add_multiple_of_row(0, 2, 2/5) A.add_multiple_of_row(0, 1, -1/2) A.rescale_row(0, -1) A.rescale_row(1, 1/2) A.rescale_row(2, -1/5) print A I.add_multiple_of_row(1, 0, 3) I.add_multiple_of_row(2, 0, -1) I.add_multiple_of_row(2, 1, -1) I.add_multiple_of_row(1, 2,7/5 ) I.add_multiple_of_row(0, 2, 2/5) I.add_multiple_of_row(0, 1, -1/2) I.rescale_row(0, -1) I.rescale_row(1, 1/2) I.rescale_row(2, -1/5) print I #here I is inverse of A
Solution by:
- eshwara
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