I have a bunch of problems like this. I have no idea how to do it. Could someone guide me with just one problem: If f is one-to-one and f(-3)=13, then f^-1(13)=? and (f(-3))^-1=?
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when it comes to functions, f^-1(x) means find y in f(y) = x. so in your example f^-1(13) = -3 since f(-3) = 13. when it comes to numbers, x^-1 = 1/x. so (f(-3))^-1 = 13^-1 (since f(-3) = 13) = 1/13.
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