document.write( "<A HREF=/cgi-bin/jump-to-question.mpl?question=467178>Question 467178</A>: <I><SPAN STYLE=\"word-break: break-all;\"> page 388<BR>\n" );
document.write( "for each pair funtion,find fog and gof , if they are exit<BR>\n" );
document.write( "a)  f = {(-1,9),(4,7)}<BR>\n" );
document.write( "    g = {(-5,4),(7,12)(4,-1)}\r<BR>\n" );
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document.write( "b)  f = {(0,-7),(1,2),(2,-1)}<BR>\n" );
document.write( "    g = {(-1,10),(2,0) </SPAN>\n" );
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