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The range of the function f(x)=\ ^(7-...

The range of the function `f(x)=\ ^(7-x)P_(x-3)` is (a) {1, 2, 3, 4, 5} (b) {1, 2, 3, 4, 5, 6} (c) {1, 2, 3, 4} (d) {1, 2, 3}

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