document.write( "Question 1150130: Find the inverse of f.
\n" ); document.write( "F(x)=7x+13
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Algebra.Com's Answer #771523 by greenestamps(13200) $\"\"$ $\"About$

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\n" ); document.write( "The method described by tutor @alan3354 is the standard algebraic way to find the inverse of a function.

\n" ); document.write( "For relatively simple functions, an alternative method can get you to the answer faster using the concept that an inverse function \"gets you back where you started\".

\n" ); document.write( "The given function does this to the input, x:
\n" ); document.write( "(1) multiply by 7
\n" ); document.write( "(2) add 13

\n" ); document.write( "The inverse function has to do the opposite operations, in the reverse order:
\n" ); document.write( "(1) subtract 13
\n" ); document.write( "(2) divide by 7

\n" ); document.write( "ANSWER: The inverse function is $\"y+=+%28x-13%29%2F7\"$

\n" ); document.write( "For practice, you should find the inverse by the standard algebraic method and verify that you get the same answer.

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