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You can put this solution on YOUR website!
\n" ); document.write( "The solution from the other tutor shows a formal mathematical method for finding the inverse.
\n" ); document.write( "The problem says to find the inverse informally... although there is no way to know what that means.
\n" ); document.write( "One easy way to find the inverse of a relatively simple function is by using the concept that an inverse function \"un-does\" what the function does.
\n" ); document.write( "To undo what a function does, the inverse function must perform the opposite operations in the opposite order.
\n" ); document.write( "For a simple function like this one, finding the inverse function by this method is simple.
\n" ); document.write( "The given function performs the following operations on the input:
\n" ); document.write( "(1) multiple by 5; and
\n" ); document.write( "(2) add 4
\n" ); document.write( "The inverse function therefore needs to perform these operations on the input:
\n" ); document.write( "(1) subtract 4; and
\n" ); document.write( "(2) divide by 5
\n" ); document.write( "The inverse function is then
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