1.Show that the statement p: “If x is a real number such that x3 + 4x = 0, then x is 0” is true by (i) direct method
(ii) method of contradiction
(iii) method of contrapositive

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The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.

Abc4n: 2mm: n2: 41: 2m: n=1: 2