document.write( "Question 1179409: if f(x) = ax+b/cx+d, x≠ -d/c-a/c, find f^-1(x) \n" ); document.write( "
Algebra.Com's Answer #809019 by Edwin McCravy(20059)\"\" \"About 
You can put this solution on YOUR website!
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document.write( "\"f%28x%29+=+%28ax%2Bb%29%2F%28cx%2Bd%29\"\r\n" );
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document.write( "Write y for f(x)\r\n" );
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document.write( "\"y+=+%28ax%2Bb%29%2F%28cx%2Bd%29\"\r\n" );
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document.write( "Interchange x and y\r\n" );
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document.write( "\"x+=+%28ay%2Bb%29%2F%28cy%2Bd%29\"\r\n" );
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document.write( "Solve for y:\r\n" );
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document.write( "\"x%28cy%2Bd%29+=+ay%2Bb\"\r\n" );
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document.write( "\"cxy%2Bdx+=+ay%2Bb\"\r\n" );
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document.write( "\"cxy-ay+=+b+-+dx\"\r\n" );
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document.write( "\"y%28cx-a%29+=+%28b-dx%29\"\r\n" );
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document.write( "\"y+=+%28b-dx%29%2F%28cx-a%29\" \r\n" );
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document.write( "Write f-1(x) for y:\r\n" );
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document.write( "f-1(x) = \"%28b-dx%29%2F%28cx-a%29\" \r\n" );
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document.write( "Edwin
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