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Salina
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The range of f and the domain of g are both {5, 9, 1}, not {4, 9, 1}. Neither f o g nor g o f exist. The function f maps 3 to 9, but 9 is not in the domain of g. The function g maps 2 to -2, which is not in the domain of f.
I dont get it what oder pair for fog and gof