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All multiples of 9 are composite numbers; however, 9 itself is not a prime number. Its factors are 1, 3, and 9.
3-2 + 1 = 1/ 32 + 1 = 1/9 + 1 = 1/9 + 1(9/9) = 1/9 + 9/9 = (1 + 9)/9 = 10/9 = 1 1/9 or3-2+1 = 3-1 = 1/3
1/5
two 1 / 9 x 9 = 1x9 / 9 = 9 / 9 = 1 / 1 = 1 2 / 9 x 9 = 2x9 / 9 = 18 / 9 = 2 / 1 = 2
1/9 + 1/3 = 1/9 + 3/9 = 4/9