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Mathematics: Post your doubts here!

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in this quest, the lAl is 32

but the problem is the matrix is in fraction. when im multiplying im getting a wrong asnswer. but when i invert the 1/32 to 32/1 and multiply the naswer is correct.

any idea why?
u have to *divide* the Adjoint by 1/32, not to 'multiply it!
and lAl = 1/32, not 32.
untitled.JPG
 
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OK then? still after i divide the adjoint, im getting the wrong answer! and when should u divide the adjoint? only when the Matrix is in fraction?
 
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OK then? still after i divide the adjoint, im getting the wrong answer! and when should u divide the adjoint? only when the Matrix is in fraction?
WHATSOEVER is the matrix type, u will always DIVIDE THE ADJ WITH DETERMINANT TO FIND THE INVERSE.

gimme the link...
 
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file:///C:/Users/AhsanSheraz/Downloads/p4November%202000.pdf
Q1 (a)(ii)
its of 1 mark so wt shortcut r we gonna use :confused:
 
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