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What is the difference in what f (4) equals in a function and finding x when f(x) is 4

User Wukong
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In a function, f(4) means that we are finding the value of the function when the input is 4. This means that we are evaluating the function at x = 4 and finding the corresponding output value.

On the other hand, finding x when f(x) is 4 means that we are solving for the input value that gives the output of 4. This means that we are finding the value of x that makes the function equal to 4.
User Eldon
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