A homework problem asks for a sketch of the graph of the inverse of (x) = x
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A homework problem asks for a sketch of the graph of the inverse of ƒ(x) = x + cos x. Frank, after trying but failing to find a formula for ƒ−1(x), says it’s impossible to graph the inverse. Bianca hands in an accurate sketch without solving for ƒ−1. How did Bianca complete the problem?
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