sleepyjess
If f(x) = log2 (x + 4), what is f^−1 (3)?
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sleepyjess
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@agent0smith
kc_kennylau
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\[3=\log_2x+4\]solve for x
sleepyjess
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how do you get that? it is the inverse
kc_kennylau
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exactly
sleepyjess
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but that isnt how you get to the inverse
sleepyjess
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I know that I need to switch the x and y but that is as far as I got.
kc_kennylau
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just the same, but my method is faster :P
douglaswinslowcooper
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"Inverse" may mean reciprocal, as so x^-1 = 1/x
but it may mean going from ln x to exp(x), for example.
Something is wrong, as none of your options correspond to my thought.
kc_kennylau
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inverse as in inverse function he means