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umka21 [38]
3 years ago
9

If f(x) = 3x + 1 and f^-1 = x-1/3 , then f^-1(7) = A . 22 B . 2 C . -2

Mathematics
1 answer:
kolezko [41]3 years ago
5 0
B

You can find it by plugging 7 in for x in the f^-1(x).  so, 7-1/3
6/3
2
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