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Difficulty: 2/102023 NMTC 2023 (QII-67)

The inverse of the function f(x)=2x-3 is ________.

Guide / Hint

Hint 1: Set the function equal to : .

Hint 2: Isolate the variable in terms of .

Hint 3: Swap and to write the inverse function.

Solution

Step 1 (Setup inverse equation): Let :

Step 2 (Solve for x in terms of y): We isolate :

Step 3 (Formulate Inverse Function): Swap and to obtain the inverse function :

Step 4 (Conclusion): The inverse function is exactly (x+3)/2.

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