update ok

update ok

07/Solutions #07/matrices/#07 matrices .sagews

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+︠10a3b9c6-1411-4852-afb5-11c9e958e9bfs︠
+A = Matrix([[1,-4,7],[14,6,8],[-4,-1,2]])
+print A
+︡b09e747f-98a3-4b68-9179-1d6d1a145b8a︡{"stdout":"[ 1 -4  7]\n[14  6  8]\n[-4 -1  2]\n"}︡{"done":true}︡
+︠88b3a883-118e-4fc1-8545-6b4fed43c685s︠
+B = Matrix([[2,3,9],[-1,17,6],[0,5,-7]])
+print B
+︡66652c65-8b89-4dcf-9037-de49e560d755︡{"stdout":"[ 2  3  9]\n[-1 17  6]\n[ 0  5 -7]\n"}︡{"done":true}︡
+︠4f23bb26-c323-4264-93e6-6ac97cf3242es︠
+'''product of matrices A*B '''
+A*B
+︡c250a709-cf04-4e75-a284-6ba8ee817326︡{"stdout":"'product of matrices A*B '\n"}︡{"stdout":"[  6 -30 -64]\n[ 22 184 106]\n[ -7 -19 -56]\n"}︡{"done":true}︡
+︠fd3ea861-cdc8-471a-9baa-adae42638186s︠
+'''Find determinant of A'''
+A.det()
+︡dc2acbbd-f9f7-44c0-92d0-8a2774eae88b︡{"stdout":"'Find determinant of A'\n"}︡{"stdout":"330\n"}︡{"done":true}︡
+︠29ed34bd-49fa-4e77-8c64-cf30c7faf5e7s︠
+''' inverse of B'''
+B.transpose()
+︡b86e062a-fd7d-4d91-a44c-d9855ba2f62d︡{"stdout":"' inverse of B'\n"}︡{"stdout":"[ 2 -1  0]\n[ 3 17  5]\n[ 9  6 -7]\n"}︡{"done":true}︡
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