Student 999
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Are question 1ii and 1 iii wrong?Name:  E8BA886A-28D5-4851-A3A4-5B91DFEC5EEA.png
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Phideaux
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I cant see an answer to either 1ii or 1iii.
What did you get for the determinants?
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Student 999
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(Original post by Phideaux)
I cant see an answer to either 1ii or 1iii.
What did you get for the determinants?
Det(A)=5-x
Det(B)=x-3
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Phideaux
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So when you subtract those answers what value for x do you get?
When you add those answers are there any values for x that are valid?
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Student 999
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(Original post by Phideaux)
So when you subtract those answers what value for x do you get?
When you add those answers are there any values for x that are valid?
It’s impossible to get 0 when you add the two determinants since the x cancels out but for 1iii. X=4
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Phideaux
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(Original post by Student 999)
It’s impossible to get 0 when you add the two determinants.
Correct.
So are there any values of x for which det(A) + det (B) = 0 ?
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