document.write( "Question 29925: Please help.
\n" ); document.write( "Question: Find the equation of the inverse of f(x)=7x+3/8
\n" ); document.write( "Solutions to Choose From:
\n" ); document.write( "(a) f^1(x)=8x+3/7\r
\n" ); document.write( "\n" ); document.write( "(b) f^1 (x)=8/7x+3\r
\n" ); document.write( "\n" ); document.write( "(c) f^1 (x) = 7x-8\r
\n" ); document.write( "\n" ); document.write( "(d) f^1 (x) = 8x-3/7
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Algebra.Com's Answer #16708 by sdmmadam@yahoo.com(530)\"\" \"About 
You can put this solution on YOUR website!
Probably the problem is f(x) = (7x+3)/8
\n" ); document.write( "Let f(x) = y
\n" ); document.write( "Then y =(7x+3)/8
\n" ); document.write( "Which gives 8y = 7x+3
\n" ); document.write( "8y-3 = 7x
\n" ); document.write( "x = (8y-3)/7
\n" ); document.write( "Putting x in the place of y, the above x becomes inverse of x
\n" ); document.write( "Therefore inverse of x
\n" ); document.write( "= (8x-3)/7
\n" ); document.write( "Which is your choice (d) provided you put the bracket for the whole (8x-3)
\n" ); document.write( "Note: For every funciton it is custormary to call the domain arbitrary member to be x and hence for the new function: f inverse of x which is also a function in x and hence replace y by x for the inverse function consideration!
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