exam
Maths Puzzle
Numerical Ability
15 + 2 log2^x =31
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exam Other Question
1. Prove that, for square matrices A and B, AB = BA if and only if (A - B)(A + B) = A^2 - B^2
2. Solve the equation XA^2 = A^-1 for X, assuming all matrices involved are inverti
Given: A(1,6), B(7,9), C(13,6), D(3,1).
Prove: ABCD is a trapazoid