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anonymous

  • 5 years ago

determine whether f(x)=5x-4 and g(x)=x+4/5 are inverses

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  1. anonymous
    • 5 years ago
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    to take the inverse of a function put it in the form of y=\[y = 5x - 4\] now, invert y to x and x to y:\[x = 5y-4\] solve for y and you'll find the inverse function:\[5y = x + 4\]\[y = {x \over 5} + {4 \over 5} \] The inverse is different from g(x)

  2. anonymous
    • 5 years ago
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    actually did you mean?\[g(x) = {x + 4 \over 5} \]

  3. anonymous
    • 5 years ago
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    yes, that's what I meant

  4. anonymous
    • 5 years ago
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    then yes they are the same\[y = {x \over5} + {4\over5} = {x + 4 \over 5 }\]

  5. anonymous
    • 5 years ago
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    thank U very much!

  6. anonymous
    • 5 years ago
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    np

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