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Maths Puzzle
Numerical Ability
Find three consecutive even integers such that 3 times the sum of the first two is 48 less than the third.
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This problem has to do with permutations:Let n = 9
sigma = (2 3 7 5 6) and mu = (1 8 9 4)
1. Compute sigma of mu and mu of sigma
2. Compute sigma-squared and sigma-cubed.
I am having trouble getting problems into the quadratic form, for instance I don't undersatnd how to do put this problem into the right form.
(x+1)^2+2(x-2)=(x+1)(x-2)