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Define a set M recursively as follows. B. 3 and 7 are in M R. If...

Define a set M recursively as follows.

B. 3 and 7 are in M

R. If x and y are in M, so is x+y. (it is possible that x = y)

Prove for every natural number n greater than or equal to 12, n is an element of M

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