book
Maths Puzzle
Numerical Ability
Evaluate the determinant
2 -1 -3
5 9 4
7 6 -2
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book Other Question
Dealing with contradiction: Show that for any positive integer a and any prime p, if p is divides a, then p does not divide a+1.
solve for x
2x-9/x-5 = 1/x-5